31001112312 has 64 divisors (see below), whose sum is σ = 78425534880. Its totient is φ = 10211008512.

The previous prime is 31001112199. The next prime is 31001112347. The reversal of 31001112312 is 21321110013.

It is a happy number.

It is a super-2 number, since 2×31001112312² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31001112291 and 31001112300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1509988 + ... + 1530380.

Almost surely, 2^31001112312 is an apocalyptic number.

It is an amenable number.

31001112312 is an abundant number, since it is smaller than the sum of its proper divisors (47424422568).

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

31001112312 is a wasteful number, since it uses less digits than its factorization.

31001112312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21152 (or 21148 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31001112312 its reverse (21321110013), we get a palindrome (52322222325).

The spelling of 31001112312 in words is "thirty-one billion, one million, one hundred twelve thousand, three hundred twelve".