11113131123 has 16 divisors (see below), whose sum is σ = 16509772800. Its totient is φ = 7388110440.

The previous prime is 11113131119. The next prime is 11113131163. The reversal of 11113131123 is 32113131111.

It is not a de Polignac number, because 11113131123 - 2² = 11113131119 is a prime.

It is a super-2 number, since 2×11113131123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11113131096 and 11113131105.

It is not an unprimeable number, because it can be changed into a prime (11113131163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 563563 + ... + 582948.

It is an arithmetic number, because the mean of its divisors is an integer number (1031860800).

Almost surely, 2^11113131123 is an apocalyptic number.

11113131123 is a deficient number, since it is larger than the sum of its proper divisors (5396641677).

11113131123 is a wasteful number, since it uses less digits than its factorization.

11113131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146879 (or 1146873 counting only the distinct ones).

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

Adding to 11113131123 its reverse (32113131111), we get a palindrome (43226262234).

The spelling of 11113131123 in words is "eleven billion, one hundred thirteen million, one hundred thirty-one thousand, one hundred twenty-three".