Compare 121 vs 128
| Property | 121 | 128 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 1 | 1 |
| Total factors | 2 | 7 |
| Prime factorization | 112 | 27 |
| Prime factorization | 11 × 11 | 2 × 2 × 2 × 2 × 2 × 2 × 2 |
| Divisors count | 3 | 8 |
| Divisors | 1, 11, 121 | 1, 2, 4, 8, 16, 32, 64, 128 |
| Number of properties | 1 | 0 |
| Semiprimes | 40th | |
| Roman numberals | CXXI | CXXVIII |
| Base 2 | 11110012 | 100000002 |
| Base 3 | 111113 | 112023 |
| Base 4 | 13214 | 20004 |
| Base 5 | 4415 | 10035 |
| Base 6 | 3216 | 3326 |
| Base 7 | 2327 | 2427 |
| Base 8 | 1718 | 2008 |
| Base 9 | 1449 | 1529 |
| Base 10 | 12110 | 12810 |
| Base 11 | 10011 | 10711 |
| Base 12 | a112 | a812 |
| Base 13 | 9413 | 9b13 |
| Base 14 | 8914 | 9214 |
| Base 15 | 8115 | 8815 |
| Base 16 | 7916 | 8016 |