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The centyllion is equal to \(10^{2^{102}} = 10^{5,070,602,400,912,917,605,986,812,821,504}\) in the -yllion system, or 10 squared 102 times.[1][2] It is equal to 1 followed by 2102 (or approximately 5.07 nonillion) zeros. It is 2102+1 digits long. This number is comparable to Bowers' Quectillion and Metsuka The Cute Princess 2007's Maximusdecillion.

In the Knuth-Pelletier -yllion system, 102102 is called a quinquagintylliard, while centyllion is equal to 102201=103,213,876,088,517,980,551,083,924,184,682,325,205,044,405,987,565,585,670,602,752 which is equal to centinovemnonagintyllion in the normal -yllion system.

Names in -illion systems[]

In the short scale, it is also called:

one hundred millinonagintasescentilliducentillioctingentilliquattuortrecentilliquinquatrecentillioctosexagintaoctingentilliduosexagintasescentilliseptuagintaducentilliquadragintanongentilliquingentillion

According to Landon Curt Noll's The English name of a number, is also known as:

ten milliamilliamilliamilliamilliamilliamilliamilliamilliamilliasescennonaginmilliamilliamilliamilliamilliamilliamilliamilliamilliaduocenmilliamilliamilliamilliamilliamilliamilliamilliaoctingenmilliamilliamilliamilliamilliamilliamilliatrecenquattuormilliamilliamilliamilliamilliamilliatrecenquinmilliamilliamilliamilliamilliaoctingenoctosexaginmilliamilliamilliamilliasescenduosexaginmilliamilliamilliaduocenseptuaginmilliamillianongenquadraginmilliaquingentillion

Approximations in other notations[]

Notation Lower bound Upper bound
Scientific notation \(10^{5.070602 \times 10^{30}}\)
Arrow notation \(10\uparrow2\uparrow102\)
Down-arrow notation \(564\downarrow\downarrow12\) \(565\downarrow\downarrow12\)
Steinhaus-Moser Notation 21[3][3] 22[3][3]
Copy notation 4[4[31]] 5[5[31]]
H* function H(H(9)) H(2H(9))
Taro's multivariable Ackermann function A(3,A(3,100)) A(3,A(3,101))
Pound-Star Notation #*((1))*(2,0,10)*4 #*((1))*(5,2)*9
BEAF {10,{2,102}}
Hyper-E notation EE[2]102
Bashicu matrix system (0)(1)[10]
Hyperfactorial array notation (27!)! (28!)!
Fast-growing hierarchy \(f_2(f_2(96))\) \(f_2(f_2(97))\)
Hardy hierarchy \(H_{\omega^22}(96)\) \(H_{\omega^22}(97)\)
Slow-growing hierarchy \(g_{\omega^{\omega^{\omega3}5}}(10)\) \(g_{\omega^{\omega^{\omega3}6}}(10)\)

See also[]

Sources[]