100231312131 has 6 divisors (see below), whose sum is σ = 144778561980. Its totient is φ = 66820874748.

The previous prime is 100231312127. The next prime is 100231312133. The reversal of 100231312131 is 131213132001.

It is not a de Polignac number, because 100231312131 - 2² = 100231312127 is a prime.

It is a super-2 number, since 2×100231312131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100231312133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5568406221 + ... + 5568406238.

It is an arithmetic number, because the mean of its divisors is an integer number (24129760330).

Almost surely, 2^100231312131 is an apocalyptic number.

100231312131 is a deficient number, since it is larger than the sum of its proper divisors (44547249849).

100231312131 is a wasteful number, since it uses less digits than its factorization.

100231312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11136812465 (or 11136812462 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 100231312131 its reverse (131213132001), we get a palindrome (231444444132).

The spelling of 100231312131 in words is "one hundred billion, two hundred thirty-one million, three hundred twelve thousand, one hundred thirty-one".