Compare 1218 vs 1221
| Property | 1218 | 1221 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 4 | 3 |
| Total factors | 4 | 3 |
| Prime factorization | 21 × 31 × 71 × 291 | 31 × 111 × 371 |
| Prime factorization | 2 × 3 × 7 × 29 | 3 × 11 × 37 |
| Divisors count | 16 | 8 |
| Divisors | 1, 2, 3, 6, 7, 14, 21, 29, 42, 58, 87, 174, 203, 406, 609, 1218 | 1, 3, 11, 33, 37, 111, 407, 1221 |
| Number of properties | 0 | 0 |
| Roman numberals | MCCXVIII | MCCXXI |
| Base 2 | 100110000102 | 100110001012 |
| Base 3 | 12000103 | 12000203 |
| Base 4 | 1030024 | 1030114 |
| Base 5 | 143335 | 143415 |
| Base 6 | 53506 | 53536 |
| Base 7 | 33607 | 33637 |
| Base 8 | 23028 | 23058 |
| Base 9 | 16039 | 16069 |
| Base 10 | 121810 | 122110 |
| Base 11 | a0811 | a1011 |
| Base 12 | 85612 | 85912 |
| Base 13 | 72913 | 72c13 |
| Base 14 | 63014 | 63314 |
| Base 15 | 56315 | 56615 |
| Base 16 | 4c216 | 4c516 |