111021323431 has 16 divisors (see below), whose sum is σ = 118525237600. Its totient is φ = 103684935168.

The previous prime is 111021323417. The next prime is 111021323459. The reversal of 111021323431 is 134323120111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111021323431 is a prime.

It is a super-2 number, since 2×111021323431² (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 (111021323401) 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, 2878285 + ... + 2916601.

It is an arithmetic number, because the mean of its divisors is an integer number (7407827350).

Almost surely, 2^111021323431 is an apocalyptic number.

111021323431 is a deficient number, since it is larger than the sum of its proper divisors (7503914169).

111021323431 is a wasteful number, since it uses less digits than its factorization.

111021323431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40498.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 111021323431 its reverse (134323120111), we get a palindrome (245344443542).

The spelling of 111021323431 in words is "one hundred eleven billion, twenty-one million, three hundred twenty-three thousand, four hundred thirty-one".