13031031111012 has 72 divisors (see below), whose sum is σ = 34463855409984. Its totient is φ = 4143682483776.

The previous prime is 13031031110953. The next prime is 13031031111017. The reversal of 13031031111012 is 21011113013031.

13031031111012 is a `hidden beast` number, since 1 + 30 + 310 + 311 + 1 + 1 + 0 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (13031031111017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20787618 + ... + 21405305.

It is an arithmetic number, because the mean of its divisors is an integer number (478664658472).

Almost surely, 2^{13031031111012} is an apocalyptic number.

13031031111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13031031111012 is an abundant number, since it is smaller than the sum of its proper divisors (21432824298972).

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

13031031111012 is a wasteful number, since it uses less digits than its factorization.

13031031111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42193329 (or 42193324 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 13031031111012 its reverse (21011113013031), we get a palindrome (34042144124043).

The spelling of 13031031111012 in words is "thirteen trillion, thirty-one billion, thirty-one million, one hundred eleven thousand, twelve".