Compare 2011 vs 2021
| Property | 2011 | 2021 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 20111 | 431 × 471 |
| Prime factorization | 2011 | 43 × 47 |
| Divisors count | 2 | 4 |
| Divisors | 1, 2011 | 1, 43, 47, 2021 |
| Number of properties | 4 | 1 |
| Harmonic primes | 113th | |
| Isolated primes | 184th | |
| Primes | 305th | |
| Semiprimes | 581st | |
| Sexy primes (1st member) | 130th | |
| Roman numberals | MMXI | MMXXI |
| Base 2 | 111110110112 | 111111001012 |
| Base 3 | 22021113 | 22022123 |
| Base 4 | 1331234 | 1332114 |
| Base 5 | 310215 | 310415 |
| Base 6 | 131516 | 132056 |
| Base 7 | 56027 | 56157 |
| Base 8 | 37338 | 37458 |
| Base 9 | 26749 | 26859 |
| Base 10 | 201110 | 202110 |
| Base 11 | 156911 | 157811 |
| Base 12 | 11b712 | 120512 |
| Base 13 | bb913 | bc613 |
| Base 14 | a3914 | a4514 |
| Base 15 | 8e115 | 8eb15 |
| Base 16 | 7db16 | 7e516 |