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20121131202 = 23101914392287
BaseRepresentation
bin10010101111010100…
…000001100011000010
31220221021110101000120
4102233110001203002
5312202002144302
613124333401110
71311422536044
oct225724014302
956837411016
1020121131202
118595943757
123a96639196
131b888096c3
14d8c417a94
157cb6e69bc
hex4af5018c2

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".

Divisors: 1 2 3 6 1019 1439 2038 2287 2878 3057 4317 4574 6114 6861 8634 13722 1466341 2330453 2932682 3290993 4399023 4660906 6581986 6991359 8798046 9872979 13982718 19745958 3353521867 6707043734 10060565601 20121131202