| 12121212 | ||
|---|---|---|
| < 12121211 | ||
| 12121213 > | ||
12121212 is a 8-digit-long number.
Properties
- Its factors are 1, 2, 3, 4, 6, 12, 73, 101, 137, 146, 202, 219, 274, 292, 303, 404, 411, 438, 548, 606, 822, 876, 1212, 1644, 7373, 10001, 13837, 14746, 20002, 22119, 27674, 29492, 30003, 40004, 41511, 44238, 55348, 60006, 83022, 88476, 120012, 166044, 1010101, 2020202, 3030303, 4040404, 6060606 and 12121212, making it a composite number.[1][2][3] It is also a cubefree number.[4]
- 12121212 is an even number[5][6] .
- 12121212 is an unhappy number.[7][8]
- 12121212 is abundant.[9]
- Its prime factorization is 22 × 31 × 731 × 1011 × 1371.
- 12121212 is a Harshad number, meaning it is divisible by the sum of its digits.[10]
- The sum of 12121212's digits is 12.
Approximations
| Notation | Lower bound | Upper bound | |
|---|---|---|---|
| Up-arrow notation | 3482 ↑ 2 | ||
| Scientific notation | 1.212 x 107 | ||
| Slow-growing hierarchy | \(g_{\omega^{\omega}}(7)\) | \(g_{\omega^{\omega}}(8)\) | |
| Chained arrow notation | 3482 → 2 | ||
| Bowers' Exploding Array Function/Bird's array notation | {3482,2} | ||
| Hardy hierarchy | Hω(6060606) | Hω(6060606) | |
| Middle-growing hierarchy | m(ω,23) | ||
| Hyper-E notation | E7.0835 | ||
| Hyper-E notation (non-10 base) | \(E[3482]2\) | ||
| X-Sequence Hyper-Exponential Notation | 3482{1}2 | ||
| PlantStar's Debut Notation | [4] | [5] | |
| H* function | H(1.3) | H(1.4) | |
| Bashicu matrix system with respect to version 4 | (0)[3481] | (0)[3482] | |
Sources
- ↑ OEIS A002808 - Composite numbers
- ↑ Wolfram Alpha Is 12121212 composite?
- ↑ Wolfram Alpha 12121212's factors
- ↑ OEIS A004709 - Cubefree numbers
- ↑ OEIS A005843 - Even numbers
- ↑ Wolfram Alpha Is 12121212 even?
- ↑ Wolfram Alpha Unhappy Numbers
- ↑ OEIS A031177 - Unhappy Numbers
- ↑ OEIS A005101 - Abundant numbers
- ↑ OEIS A005349 - Harshad numbers