13031231012 has 24 divisors (see below), whose sum is σ = 23342479776. Its totient is φ = 6362048448.

The previous prime is 13031230973. The next prime is 13031231033. The reversal of 13031231012 is 21013213031.

It is a super-2 number, since 2×13031231012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621443 + ... + 642069.

It is an arithmetic number, because the mean of its divisors is an integer number (972603324).

Almost surely, 2^13031231012 is an apocalyptic number.

It is an amenable number.

13031231012 is a deficient number, since it is larger than the sum of its proper divisors (10311248764).

13031231012 is a wasteful number, since it uses less digits than its factorization.

13031231012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24347 (or 24345 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 13031231012 its reverse (21013213031), we get a palindrome (34044444043).

The spelling of 13031231012 in words is "thirteen billion, thirty-one million, two hundred thirty-one thousand, twelve".