13111312113 has 6 divisors (see below), whose sum is σ = 18938561954. Its totient is φ = 8740874736.

The previous prime is 13111312079. The next prime is 13111312129. The reversal of 13111312113 is 31121311131.

It can be written as a sum of positive squares in only one way, i.e., 12655575009 + 455737104 = 112497^2 + 21348^2 .

It is not a de Polignac number, because 13111312113 - 2²⁴ = 13094534897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13111312133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 728406220 + ... + 728406237.

Almost surely, 2^13111312113 is an apocalyptic number.

It is an amenable number.

13111312113 is a deficient number, since it is larger than the sum of its proper divisors (5827249841).

13111312113 is a wasteful number, since it uses less digits than its factorization.

13111312113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456812463 (or 1456812460 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

Adding to 13111312113 its reverse (31121311131), we get a palindrome (44232623244).

The spelling of 13111312113 in words is "thirteen billion, one hundred eleven million, three hundred twelve thousand, one hundred thirteen".