11312112231 has 24 divisors (see below), whose sum is σ = 19178668704. Its totient is φ = 6289358400.

The previous prime is 11312112199. The next prime is 11312112269. The reversal of 11312112231 is 13221121311.

11312112231 is a `hidden beast` number, since 11 + 312 + 112 + 231 = 666.

It is not a de Polignac number, because 11312112231 - 2⁵ = 11312112199 is a prime.

It is a super-2 number, since 2×11312112231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312112281) 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 23 ways as a sum of consecutive naturals, for example, 2424120 + ... + 2428781.

It is an arithmetic number, because the mean of its divisors is an integer number (799111196).

Almost surely, 2^11312112231 is an apocalyptic number.

11312112231 is a deficient number, since it is larger than the sum of its proper divisors (7866556473).

11312112231 is a wasteful number, since it uses less digits than its factorization.

11312112231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4852951 (or 4852948 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11312112231 its reverse (13221121311), we get a palindrome (24533233542).

The spelling of 11312112231 in words is "eleven billion, three hundred twelve million, one hundred twelve thousand, two hundred thirty-one".