13331131231 has 4 divisors (see below), whose sum is σ = 14543052264. Its totient is φ = 12119210200.

The previous prime is 13331131217. The next prime is 13331131273. The reversal of 13331131231 is 13213113331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13213113331 = 11 ⋅1201192121.

It is a cyclic number.

It is not a de Polignac number, because 13331131231 - 2⁷ = 13331131103 is a prime.

It is a super-2 number, since 2×13331131231² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13331131031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 605960500 + ... + 605960521.

It is an arithmetic number, because the mean of its divisors is an integer number (3635763066).

Almost surely, 2^13331131231 is an apocalyptic number.

13331131231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13331131231 is a deficient number, since it is larger than the sum of its proper divisors (1211921033).

13331131231 is a wasteful number, since it uses less digits than its factorization.

13331131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211921032.

The product of its digits is 486, while the sum is 22.

Adding to 13331131231 its reverse (13213113331), we get a palindrome (26544244562).

The spelling of 13331131231 in words is "thirteen billion, three hundred thirty-one million, one hundred thirty-one thousand, two hundred thirty-one".