Base | Representation |
---|---|
bin | 10010101110001000… |
… | …000100101011111000 |
3 | 1220212212222211111211 |
4 | 102232020010223320 |
5 | 312131403033422 |
6 | 13122342532504 |
7 | 1311061363120 |
oct | 225610045370 |
9 | 56785884454 |
10 | 20101221112 |
11 | 8585684a35 |
12 | 3a8ba37134 |
13 | 1b8465819b |
14 | d89913c80 |
15 | 7c9ab2577 |
hex | 4ae204af8 |
20101221112 has 16 divisors (see below), whose sum is σ = 43074045360. Its totient is φ = 8614809024.
The previous prime is 20101221083. The next prime is 20101221143. The reversal of 20101221112 is 21112210102.
It is a junction number, because it is equal to n+sod(n) for n = 20101221092 and 20101221101.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179475133 + ... + 179475244.
It is an arithmetic number, because the mean of its divisors is an integer number (2692127835).
Almost surely, 220101221112 is an apocalyptic number.
It is an amenable number.
20101221112 is an abundant number, since it is smaller than the sum of its proper divisors (22972824248).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20101221112 is a wasteful number, since it uses less digits than its factorization.
20101221112 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 358950390 (or 358950386 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 13.
Adding to 20101221112 its reverse (21112210102), we get a palindrome (41213431214).
The spelling of 20101221112 in words is "twenty billion, one hundred one million, two hundred twenty-one thousand, one hundred twelve".
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