122 (number) - Wikipedia
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| |||
|---|---|---|---|
| Cardinal | one hundred twenty-two | ||
| Ordinal | 122nd (one hundred twenty-second) | ||
| Factorization | 2 × 61 | ||
| Divisors | 1, 2, 61, 122 | ||
| Greek numeral | ΡΚΒ´ | ||
| Roman numeral | CXXII, cxxii | ||
| Binary | 11110102 | ||
| Ternary | 111123 | ||
| Senary | 3226 | ||
| Octal | 1728 | ||
| Duodecimal | A212 | ||
| Hexadecimal | 7A16 |
122 (one hundred [and] twenty-two) is the natural number following 121 and preceding 123.
122 is a nontotient since there is no integer with exactly 122 coprimes below it. Nor is there an integer with exactly 122 integers with common factors below it, making 122 a noncototient.
122 is a semiprime.
φ(122) = φ(σ(122)).[1]
- ^ Sloane, N. J. A. (ed.). "Sequence A006872". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.