111231322031 has 16 divisors (see below), whose sum is σ = 120567605760. Its totient is φ = 102216048000.

The previous prime is 111231322001. The next prime is 111231322067. The reversal of 111231322031 is 130223132111.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111231322031 is a prime.

It is a super-2 number, since 2×111231322031² (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 = 111231321994 and 111231322012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111231322001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168656 + ... + 500906.

It is an arithmetic number, because the mean of its divisors is an integer number (7535475360).

Almost surely, 2^111231322031 is an apocalyptic number.

111231322031 is a deficient number, since it is larger than the sum of its proper divisors (9336283729).

111231322031 is a wasteful number, since it uses less digits than its factorization.

111231322031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332734.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 111231322031 its reverse (130223132111), we get a palindrome (241454454142).

The spelling of 111231322031 in words is "one hundred eleven billion, two hundred thirty-one million, three hundred twenty-two thousand, thirty-one".