111151243231 has 6 divisors (see below), whose sum is σ = 129298385040. Its totient is φ = 95272494156.

The previous prime is 111151243213. The next prime is 111151243237. The reversal of 111151243231 is 132342151111.

It is a de Polignac number, because none of the positive numbers 2^k-111151243231 is a prime.

It is a super-2 number, since 2×111151243231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111151243196 and 111151243205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111151243237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1134196311 + ... + 1134196408.

It is an arithmetic number, because the mean of its divisors is an integer number (21549730840).

Almost surely, 2^111151243231 is an apocalyptic number.

111151243231 is a deficient number, since it is larger than the sum of its proper divisors (18147141809).

111151243231 is an equidigital number, since it uses as much as digits as its factorization.

111151243231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268392733 (or 2268392726 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

Adding to 111151243231 its reverse (132342151111), we get a palindrome (243493394342).

The spelling of 111151243231 in words is "one hundred eleven billion, one hundred fifty-one million, two hundred forty-three thousand, two hundred thirty-one".