11231113131 has 32 divisors (see below), whose sum is σ = 19256371200. Its totient is φ = 6336532800.

The previous prime is 11231113081. The next prime is 11231113133. The reversal of 11231113131 is 13131113211.

It is a de Polignac number, because none of the positive numbers 2^k-11231113131 is a prime.

It is a super-2 number, since 2×11231113131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11231113133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361170 + ... + 391031.

It is an arithmetic number, because the mean of its divisors is an integer number (601761600).

Almost surely, 2^11231113131 is an apocalyptic number.

11231113131 is a deficient number, since it is larger than the sum of its proper divisors (8025258069).

11231113131 is an equidigital number, since it uses as much as digits as its factorization.

11231113131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752296 (or 752290 counting only the distinct ones).

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

Adding to 11231113131 its reverse (13131113211), we get a palindrome (24362226342).

The spelling of 11231113131 in words is "eleven billion, two hundred thirty-one million, one hundred thirteen thousand, one hundred thirty-one".