31210112100 has 36 divisors (see below), whose sum is σ = 90301258544. Its totient is φ = 8322696480.

The previous prime is 31210112093. The next prime is 31210112117. The reversal of 31210112100 is 121101213.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52016554 + ... + 52017153.

Almost surely, 2^31210112100 is an apocalyptic number.

31210112100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31210112100 is an abundant number, since it is smaller than the sum of its proper divisors (59091146444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31210112100 is a wasteful number, since it uses less digits than its factorization.

31210112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104033724 (or 104033717 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 31210112100 its reverse (121101213), we get a palindrome (31331213313).

The spelling of 31210112100 in words is "thirty-one billion, two hundred ten million, one hundred twelve thousand, one hundred".