Compare 2001 vs 2011
| Property | 2001 | 2011 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 231 × 291 | 20111 |
| Prime factorization | 3 × 23 × 29 | 2011 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 23, 29, 69, 87, 667, 2001 | 1, 2011 |
| Number of properties | 0 | 4 |
| Harmonic primes | 113th | |
| Isolated primes | 184th | |
| Primes | 305th | |
| Sexy primes (1st member) | 130th | |
| Roman numberals | MMI | MMXI |
| Base 2 | 111110100012 | 111110110112 |
| Base 3 | 22020103 | 22021113 |
| Base 4 | 1331014 | 1331234 |
| Base 5 | 310015 | 310215 |
| Base 6 | 131336 | 131516 |
| Base 7 | 55567 | 56027 |
| Base 8 | 37218 | 37338 |
| Base 9 | 26639 | 26749 |
| Base 10 | 200110 | 201110 |
| Base 11 | 155a11 | 156911 |
| Base 12 | 11a912 | 11b712 |
| Base 13 | bac13 | bb913 |
| Base 14 | a2d14 | a3914 |
| Base 15 | 8d615 | 8e115 |
| Base 16 | 7d116 | 7db16 |