31020013331013 has 64 divisors (see below), whose sum is σ = 49424543547392. Its totient is φ = 16933097226240.

The previous prime is 31020013331003. The next prime is 31020013331029. The reversal of 31020013331013 is 31013331002013.

It is not a de Polignac number, because 31020013331013 - 2⁶ = 31020013330949 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 (31020013331003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20248581 + ... + 21726597.

It is an arithmetic number, because the mean of its divisors is an integer number (772258492928).

Almost surely, 2^{31020013331013} is an apocalyptic number.

It is an amenable number.

31020013331013 is a deficient number, since it is larger than the sum of its proper divisors (18404530216379).

31020013331013 is a wasteful number, since it uses less digits than its factorization.

31020013331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478474.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31020013331013 its reverse (31013331002013), we get a palindrome (62033344333026).

The spelling of 31020013331013 in words is "thirty-one trillion, twenty billion, thirteen million, three hundred thirty-one thousand, thirteen".