13231311231 has 16 divisors (see below), whose sum is σ = 17788981248. Its totient is φ = 8747323200.

The previous prime is 13231311229. The next prime is 13231311239. The reversal of 13231311231 is 13211313231.

It is a happy number.

It is not a de Polignac number, because 13231311231 - 2¹ = 13231311229 is a prime.

It is a super-2 number, since 2×13231311231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13231311198 and 13231311207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231311239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 957451 + ... + 971171.

It is an arithmetic number, because the mean of its divisors is an integer number (1111811328).

Almost surely, 2^13231311231 is an apocalyptic number.

13231311231 is a deficient number, since it is larger than the sum of its proper divisors (4557670017).

13231311231 is a wasteful number, since it uses less digits than its factorization.

13231311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16382.

The product of its digits is 324, while the sum is 21.

Adding to 13231311231 its reverse (13211313231), we get a palindrome (26442624462).

The spelling of 13231311231 in words is "thirteen billion, two hundred thirty-one million, three hundred eleven thousand, two hundred thirty-one".