11312133131 has 6 divisors (see below), whose sum is σ = 12249233100. Its totient is φ = 10441968888.

The previous prime is 11312133127. The next prime is 11312133181. The reversal of 11312133131 is 13133121311.

It is not a de Polignac number, because 11312133131 - 2² = 11312133127 is a prime.

It is a super-2 number, since 2×11312133131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11312133121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33467681 + ... + 33468018.

It is an arithmetic number, because the mean of its divisors is an integer number (2041538850).

Almost surely, 2^11312133131 is an apocalyptic number.

11312133131 is a deficient number, since it is larger than the sum of its proper divisors (937099969).

11312133131 is an equidigital number, since it uses as much as digits as its factorization.

11312133131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66935725 (or 66935712 counting only the distinct ones).

The product of its digits is 162, while the sum is 20.

Adding to 11312133131 its reverse (13133121311), we get a palindrome (24445254442).

The spelling of 11312133131 in words is "eleven billion, three hundred twelve million, one hundred thirty-three thousand, one hundred thirty-one".