31311233112 has 32 divisors (see below), whose sum is σ = 79157617200. Its totient is φ = 10319806464.

The previous prime is 31311233111. The next prime is 31311233119. The reversal of 31311233112 is 21133211313.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311233111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7327273 + ... + 7331544.

Almost surely, 2^31311233112 is an apocalyptic number.

It is an amenable number.

31311233112 is an abundant number, since it is smaller than the sum of its proper divisors (47846384088).

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

31311233112 is a wasteful number, since it uses less digits than its factorization.

31311233112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14658915 (or 14658911 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 31311233112 its reverse (21133211313), we get a palindrome (52444444425).

The spelling of 31311233112 in words is "thirty-one billion, three hundred eleven million, two hundred thirty-three thousand, one hundred twelve".