31200402112 has 28 divisors (see below), whose sum is σ = 67541781096. Its totient is φ = 14182000640.

The previous prime is 31200402053. The next prime is 31200402157. The reversal of 31200402112 is 21120400213.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 22158673 + ... + 22160080.

Almost surely, 2^31200402112 is an apocalyptic number.

31200402112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31200402112 is an abundant number, since it is smaller than the sum of its proper divisors (36341378984).

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

31200402112 is a wasteful number, since it uses less digits than its factorization.

31200402112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44318776 (or 44318766 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31200402112 its reverse (21120400213), we get a palindrome (52320802325).

The spelling of 31200402112 in words is "thirty-one billion, two hundred million, four hundred two thousand, one hundred twelve".