31013221112013 has 48 divisors (see below), whose sum is σ = 49200428894400. Its totient is φ = 17319809654784.

The previous prime is 31013221111949. The next prime is 31013221112017. The reversal of 31013221112013 is 31021112231013.

It is not a de Polignac number, because 31013221112013 - 2⁶ = 31013221111949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013221112017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5742163 + ... + 9746736.

It is an arithmetic number, because the mean of its divisors is an integer number (1025008935300).

Almost surely, 2^{31013221112013} is an apocalyptic number.

It is an amenable number.

31013221112013 is a deficient number, since it is larger than the sum of its proper divisors (18187207782387).

31013221112013 is a wasteful number, since it uses less digits than its factorization.

31013221112013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15489226 (or 15489219 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31013221112013 its reverse (31021112231013), we get a palindrome (62034333343026).

The spelling of 31013221112013 in words is "thirty-one trillion, thirteen billion, two hundred twenty-one million, one hundred twelve thousand, thirteen".