Compare 990121 vs 990142
| Property | 990121 | 990142 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 111 × 900111 | 21 × 4950711 |
| Prime factorization | 11 × 90011 | 2 × 495071 |
| Divisors count | 4 | 4 |
| Divisors | 1, 11, 90011, 990121 | 1, 2, 495071, 990142 |
| Number of properties | 1 | 1 |
| Semiprimes | 208057th | 208065th |
| Roman numberals | ||
| Base 2 | 111100011011101010012 | 111100011011101111102 |
| Base 3 | 12120220120113 | 12120220122213 |
| Base 4 | 33012322214 | 33012323324 |
| Base 5 | 2231404415 | 2231410325 |
| Base 6 | 331155216 | 331155546 |
| Base 7 | 112624367 | 112624667 |
| Base 8 | 36156518 | 36156768 |
| Base 9 | 17681649 | 17681879 |
| Base 10 | 99012110 | 99014210 |
| Base 11 | 61699011 | 6169aa11 |
| Base 12 | 3b8ba112 | 3b8bba12 |
| Base 13 | 28889213 | 2888aa13 |
| Base 14 | 1bab8d14 | 1baba614 |
| Base 15 | 14858115 | 14859715 |
| Base 16 | f1ba916 | f1bbe16 |