111431123031 has 24 divisors (see below), whose sum is σ = 166030040304. Its totient is φ = 66237684480.

The previous prime is 111431123021. The next prime is 111431123047. The reversal of 111431123031 is 130321134111.

It is not a de Polignac number, because 111431123031 - 2⁶ = 111431122967 is a prime.

It is a super-2 number, since 2×111431123031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111431122989 and 111431123007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111431123021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3007800 + ... + 3044621.

It is an arithmetic number, because the mean of its divisors is an integer number (6917918346).

Almost surely, 2^111431123031 is an apocalyptic number.

111431123031 is a deficient number, since it is larger than the sum of its proper divisors (54598917273).

111431123031 is a wasteful number, since it uses less digits than its factorization.

111431123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6052479 (or 6052460 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 111431123031 its reverse (130321134111), we get a palindrome (241752257142).

The spelling of 111431123031 in words is "one hundred eleven billion, four hundred thirty-one million, one hundred twenty-three thousand, thirty-one".