111130121231 has 6 divisors (see below), whose sum is σ = 117286915032. Its totient is φ = 105281167140.

The previous prime is 111130121213. The next prime is 111130121261. The reversal of 111130121231 is 132121031111.

It is a de Polignac number, because none of the positive numbers 2^k-111130121231 is a prime.

It is a super-2 number, since 2×111130121231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111130121261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153919475 + ... + 153920196.

It is an arithmetic number, because the mean of its divisors is an integer number (19547819172).

Almost surely, 2^111130121231 is an apocalyptic number.

111130121231 is a deficient number, since it is larger than the sum of its proper divisors (6156793801).

111130121231 is an equidigital number, since it uses as much as digits as its factorization.

111130121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307839709 (or 307839690 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111130121231 its reverse (132121031111), we get a palindrome (243251152342).

The spelling of 111130121231 in words is "one hundred eleven billion, one hundred thirty million, one hundred twenty-one thousand, two hundred thirty-one".