13120111231 has 2 divisors, whose sum is σ = 13120111232. Its totient is φ = 13120111230.

The previous prime is 13120111201. The next prime is 13120111261. The reversal of 13120111231 is 13211102131.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (13120111201) and next prime (13120111261).

It is a cyclic number.

It is not a de Polignac number, because 13120111231 - 2²⁵ = 13086556799 is a prime.

It is a super-2 number, since 2×13120111231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13120111201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560055615 + 6560055616.

It is an arithmetic number, because the mean of its divisors is an integer number (6560055616).

Almost surely, 2^13120111231 is an apocalyptic number.

13120111231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13120111231 is an equidigital number, since it uses as much as digits as its factorization.

13120111231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 13120111231 its reverse (13211102131), we get a palindrome (26331213362).

The spelling of 13120111231 in words is "thirteen billion, one hundred twenty million, one hundred eleven thousand, two hundred thirty-one".