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A trillion is equal to 1012 in the short scale, or 1018 in the long scale.[1][2][3][4]

Written out in decimal form trillion (in the short scale) is:

1000000000000

In long scale:

1000000000000000000

Alternative names[]

This number is also called tetrillion in Russ Rowlett's Greek-based naming system.[5]

Aarex Tiaokhiao gave the name tetillion, referring to the value of this number.[6] He also calls 1012 dudoocol, 12-noogol[7], or goonaoldecault, and it's equal to a(10,100,0)x[10] in Aarex's Array Notation.[8]

Wikia user NumLynx gave the name quadrasand for this number's short scale value.[9]

Nicolas Chuquet coined byllion for 1018 (not to be confused with 1016), according to the Triparty en la science des nombres, which was previously lost and not rediscovered until 1880.[10][11] Later it became billion in long scale.

Username5243 gave the name niloogolnoniplex, referring to the short scale value of this number.[12]

BlankEntity calls this number Joogol.[13]

Alistair Cockburn coined gar-million for this number, referring to the quote below,[14] and it's equal to gar(1,000,000) = 1,000,0002.

For example, “gar-four” is four fours. “Gar-million” is a million millions. And “gar-googleplex” is a googleplex googleplexes. A good number.
  —Alistar Cockburn[src]


CompactStar gave the name tryriad for this number as part of the -yriad system, referring to it being myriad3.[15]

DeepLineMadom calls the number boogolnoniplex and troo-dodecol, and is equal to 10[3]12 in DeepLineMadom's Array Notation.[16]

Examples[]

  • It is the first -illion to exceed 1010 in the short scale.
  • It is equal to 1 million squared in the short scale and 1 million cubed in the long scale.
  • The nearest star to the Earth (besides the sun), Alpha Centauri, is over 26 trillion miles away or 41.842 trillion kilometers away.[17]
  • The human body contains somewhere around 50 trillion cells.[17]
  • There are roughly 3,500,000,000,000 fish in the world.[17]
  • The SI prefix tera- multiplies by one trillion.
  • If one sandcastle contains one million grains of sand then you could make one million sandcastles with 1 trillion grains of sand.
  • 1 trillion flops or operations per second is called a teraflop.
  • A 2016 estimate says there are 2,000,000,000,000 galaxies in the observable universe.
  • An estimate says there were 3.04 × 1012 trees on Earth in 2015.
  • Andromeda Galaxy, which is part of the same Local Group as our galaxy, contains about 1012 stars.
  • The surface of the human body houses roughly 1012 bacteria.
  • 1.9786782 × 1012 is a rough estimate of the total number of links on Wikipedia.
  • 1013 (ten Trillion)– The approximate number of known non-trivial zeros of the Riemann zeta function as of 2004.
  • As of 2021, the number of known digits of π is 50,000,000,000,000 (5×1013).
  • Approximately 1014 (one hundred Trillion) synapses in the human brain.
  • 281,474,976,710,656 (248) possible unique physical addresses on MAC-48.
  • 953,467,954,114,363 is the largest known Motzkin prime.
  • There are 2 trillion galaxies in the observable universe.
  • There are 3 trillion trees in the world.
  • Some villains (usually extremely powerful ones) have killed trillions of people.

As a banknote denomination[]

Some currencies, such as the German Papiermark and the Hungarian pengő, had banknotes with this number in the denomination.

Approximations[]

For short scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{12}\)
Arrow notation \(10\uparrow12\)
Steinhaus-Moser Notation 11[3] 12[3]
Copy notation 9[12] 1[13]
Chained arrow notation \(10\rightarrow12\)
Taro's multivariable Ackermann function A(3,36) A(3,37)
Pound-Star Notation #*(4,2,3)*4 #*(1,2)*8
BEAF & Bird's array notation {10,12}
Hyper-E notation E12
Bashicu matrix system (0)(0)[1000]
Hyperfactorial array notation 14! 15!
Fast-growing hierarchy \(f_2(34)\) \(f_2(35)\)
Hardy hierarchy \(H_{\omega^2}(34)\) \(H_{\omega^2}(35)\)
Slow-growing hierarchy \(g_{\omega^{\omega+2}}(10)\)

For long scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{18}\)
Arrow notation \(10\uparrow18\)
Steinhaus-Moser Notation 15[3] 16[3]
Copy notation 9[18] 1[19]
Chained arrow notation \(10\rightarrow18\)
Taro's multivariable Ackermann function A(3,56) A(3,57)
Pound-Star Notation #*(4,1,3)*6 #*(3,1)*13
BEAF & Bird's array notation {10,18}
Hyper-E notation E18
Bashicu matrix system (0)(0)[31622] (0)(0)[31623]
Hyperfactorial array notation 19! 20!
Fast-growing hierarchy \(f_2(54)\) \(f_2(55)\)
Hardy hierarchy \(H_{\omega^2}(54)\) \(H_{\omega^2}(55)\)
Slow-growing hierarchy \(g_{\omega^{\omega+8}}(10)\)

Gallery[]

Sources[]

  1. Cambridge Dictionary Trillion
  2. Larousse (French dictionary) Trillion (source for long scale in French)
  3. Conway and Guy. The Book of Numbers. Copernicus. 1995. ISBN 978-0387979939 p.16
  4. Trillion at Wolfram MathWorld
  5. Russ Rowlett Names for Large Numbers Archived 2006-01-10.
  6. Aarex Tiaokhiao's illion numbers[dead link]
  7. Part 1 (LAN) - Aarex Googology (archived 2017-02-25)
  8. AAN Numbers - P1 - Aarex Googology[dead link]
  9. -sand numbers. Retrieved 2021-10-28.
  10. Olivier Miakinen, Grands nombres : 1270-1961, sept siècles d'histoire in Écriture des nombres en français. 1 May 2004
  11. Robert Munafo, Origins of the Chuquet Number Names
  12. Part 1 - My Large Numbers
  13. BlankEntity's Googology Site
  14. A Fuga Really Big Numbers. Archived 2016-04-11.
  15. -yriad numbers. Retrieved Apr 21, 2023
  16. Pointless Googolplex Stuffs - DLMAN Part 1 (retrieved 9 November 2024)
  17. 17.0 17.1 17.2 Saibian, Sbiis2.1.4 - Everyday Large Numbers for a Modern World. Retrieved 2013-06-11.

See also[]

Main article: -illion
1–9: million · billion · trillion · quadr · quint · sext · sept · oct · non
10–19: decillion · undec · duodec · tredec · quattuordec · quindec · sexdec · septendec · octodec · novemdec
20–29: vigintillion · unvigint · duovigint · tresvigint · quattuorvigint · quinvigint · sesvigint · septemvigint · octovigint · novemvigint
30–39: trigintillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
40–49: quadragintillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
50–59: quinquagintillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
60–69: sexagintillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
70–79: septuagintillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
80–89: octogintillion (un- · duo- · tres- · quattuor- · quin- · sex- · septem- · octo- · novem-)
90–99: nonagintillion (un- · duo- · tre- · quattuor- · quin- · se- · septe- · octo- · nove-)
100–900: centillion · ducent · trecent · quadringent · quingent · sescent · septingent · octingent · nongent
1,000–1030: millillion · dumill · dumillinonagintanongent · trimill · trimilliduotrigintatrecent · trimillisexoctogintaoctingent · quadrimill · quadrimilliquattuordecicent · quinmill · sexmill · septimill · octimill · nonimill · myr · decimilliquinsexagintasescent · dumyr · unquadragintamilliunquinquagintacent · centimill · micr · nan · pic · femt · att · zept · yoct · ront · quect
-yriad system
Main article: -yriad
myriad · dyriad · tryriad · tetryriad · pentyriad · hexyriad · heptyriad · octyriad · ennyriad · decyriad
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