Base | Representation |
---|---|
bin | 10010101111010100… |
… | …000001100011000010 |
3 | 1220221021110101000120 |
4 | 102233110001203002 |
5 | 312202002144302 |
6 | 13124333401110 |
7 | 1311422536044 |
oct | 225724014302 |
9 | 56837411016 |
10 | 20121131202 |
11 | 8595943757 |
12 | 3a96639196 |
13 | 1b888096c3 |
14 | d8c417a94 |
15 | 7cb6e69bc |
hex | 4af5018c2 |
20121131202 has 32 divisors (see below), whose sum is σ = 40327372800. Its totient is φ = 6692877648.
The previous prime is 20121131159. The next prime is 20121131203. The reversal of 20121131202 is 20213112102.
It is not an unprimeable number, because it can be changed into a prime (20121131203) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8796903 + ... + 8799189.
It is an arithmetic number, because the mean of its divisors is an integer number (1260230400).
Almost surely, 220121131202 is an apocalyptic number.
20121131202 is an abundant number, since it is smaller than the sum of its proper divisors (20206241598).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20121131202 is a wasteful number, since it uses less digits than its factorization.
20121131202 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4750.
The product of its (nonzero) digits is 48, while the sum is 15.
Adding to 20121131202 its reverse (20213112102), we get a palindrome (40334243304).
The spelling of 20121131202 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred two".
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