11312003131 has 32 divisors (see below), whose sum is σ = 13606326720. Its totient is φ = 9268992000.

The previous prime is 11312003069. The next prime is 11312003147. The reversal of 11312003131 is 13130021311.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11312003131 is a prime.

It is a super-2 number, since 2×11312003131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11312003161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1048975 + ... + 1059703.

It is an arithmetic number, because the mean of its divisors is an integer number (425197710).

Almost surely, 2^11312003131 is an apocalyptic number.

11312003131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11312003131 is a deficient number, since it is larger than the sum of its proper divisors (2294323589).

11312003131 is a wasteful number, since it uses less digits than its factorization.

11312003131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10927.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 11312003131 its reverse (13130021311), we get a palindrome (24442024442).

The spelling of 11312003131 in words is "eleven billion, three hundred twelve million, three thousand, one hundred thirty-one".