31312102031320 has 64 divisors (see below), whose sum is σ = 76860298513440. Its totient is φ = 11385726950400.

The previous prime is 31312102031261. The next prime is 31312102031377. The reversal of 31312102031320 is 2313020121313.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 31312102031291 and 31312102031300.

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, 8735494 + ... + 11786986.

Almost surely, 2^{31312102031320} is an apocalyptic number.

It is an amenable number.

31312102031320 is an abundant number, since it is smaller than the sum of its proper divisors (45548196482120).

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

31312102031320 is a wasteful number, since it uses less digits than its factorization.

31312102031320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074836 (or 3074832 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31312102031320 its reverse (2313020121313), we get a palindrome (33625122152633).

The spelling of 31312102031320 in words is "thirty-one trillion, three hundred twelve billion, one hundred two million, thirty-one thousand, three hundred twenty".