111312100231 has 4 divisors (see below), whose sum is σ = 111670017264. Its totient is φ = 110954183200.

The previous prime is 111312100219. The next prime is 111312100313. The reversal of 111312100231 is 132001213111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111312100231 is a prime.

It is a super-2 number, since 2×111312100231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111312500231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178958050 + ... + 178958671.

It is an arithmetic number, because the mean of its divisors is an integer number (27917504316).

Almost surely, 2^111312100231 is an apocalyptic number.

111312100231 is a deficient number, since it is larger than the sum of its proper divisors (357917033).

111312100231 is an equidigital number, since it uses as much as digits as its factorization.

111312100231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357917032.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 111312100231 its reverse (132001213111), we get a palindrome (243313313342).

The spelling of 111312100231 in words is "one hundred eleven billion, three hundred twelve million, one hundred thousand, two hundred thirty-one".