111320331021 has 8 divisors (see below), whose sum is σ = 164919008960. Its totient is φ = 74213553996.

The previous prime is 111320331011. The next prime is 111320331043. The reversal of 111320331021 is 120133023111.

111320331021 is a `hidden beast` number, since 1 + 11 + 320 + 3 + 310 + 21 = 666.

It is not a de Polignac number, because 111320331021 - 2⁷ = 111320330893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111320330985 and 111320331003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111320331011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2061487585 + ... + 2061487638.

It is an arithmetic number, because the mean of its divisors is an integer number (20614876120).

Almost surely, 2^111320331021 is an apocalyptic number.

It is an amenable number.

111320331021 is a deficient number, since it is larger than the sum of its proper divisors (53598677939).

111320331021 is an equidigital number, since it uses as much as digits as its factorization.

111320331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122975232 (or 4122975226 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 111320331021 its reverse (120133023111), we get a palindrome (231453354132).

The spelling of 111320331021 in words is "one hundred eleven billion, three hundred twenty million, three hundred thirty-one thousand, twenty-one".