11113123131 has 112 divisors (see below), whose sum is σ = 18698169600. Its totient is φ = 6545448000.

The previous prime is 11113123129. The next prime is 11113123171. The reversal of 11113123131 is 13132131111.

It is not a de Polignac number, because 11113123131 - 2¹ = 11113123129 is a prime.

It is a super-2 number, since 2×11113123131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11113123171) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 74584645 + ... + 74584793.

Almost surely, 2^11113123131 is an apocalyptic number.

11113123131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11113123131 is a deficient number, since it is larger than the sum of its proper divisors (7585046469).

11113123131 is a wasteful number, since it uses less digits than its factorization.

11113123131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 365 counting only the distinct ones).

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

Adding to 11113123131 its reverse (13132131111), we get a palindrome (24245254242).

The spelling of 11113123131 in words is "eleven billion, one hundred thirteen million, one hundred twenty-three thousand, one hundred thirty-one".