13231212111 has 16 divisors (see below), whose sum is σ = 21109626720. Its totient is φ = 8142284160.

The previous prime is 13231212107. The next prime is 13231212119. The reversal of 13231212111 is 11121213231.

It is not a de Polignac number, because 13231212111 - 2² = 13231212107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231212119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18847530 + ... + 18848231.

It is an arithmetic number, because the mean of its divisors is an integer number (1319351670).

Almost surely, 2^13231212111 is an apocalyptic number.

13231212111 is a deficient number, since it is larger than the sum of its proper divisors (7878414609).

13231212111 is a wasteful number, since it uses less digits than its factorization.

13231212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37695783 (or 37695777 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 13231212111 its reverse (11121213231), we get a palindrome (24352425342).

The spelling of 13231212111 in words is "thirteen billion, two hundred thirty-one million, two hundred twelve thousand, one hundred eleven".