13131231112 has 32 divisors (see below), whose sum is σ = 25160745600. Its totient is φ = 6421875264.

The previous prime is 13131231079. The next prime is 13131231121. The reversal of 13131231112 is 21113213131.

It is a self number, because there is not a number n which added to its sum of digits gives 13131231112.

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, 637714 + ... + 657982.

It is an arithmetic number, because the mean of its divisors is an integer number (786273300).

Almost surely, 2^13131231112 is an apocalyptic number.

It is an amenable number.

13131231112 is a deficient number, since it is larger than the sum of its proper divisors (12029514488).

13131231112 is a wasteful number, since it uses less digits than its factorization.

13131231112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22045 (or 22041 counting only the distinct ones).

The product of its digits is 108, while the sum is 19.

Adding to 13131231112 its reverse (21113213131), we get a palindrome (34244444243).

The spelling of 13131231112 in words is "thirteen billion, one hundred thirty-one million, two hundred thirty-one thousand, one hundred twelve".