111312221022 has 24 divisors (see below), whose sum is σ = 247694763576. Its totient is φ = 36101260656.

The previous prime is 111312220973. The next prime is 111312221047. The reversal of 111312221022 is 220122213111.

111312221022 is a `hidden beast` number, since 111 + 312 + 221 + 0 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111312220986 and 111312221004.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 83567068 + ... + 83568399.

It is an arithmetic number, because the mean of its divisors is an integer number (10320615149).

Almost surely, 2^111312221022 is an apocalyptic number.

111312221022 is an abundant number, since it is smaller than the sum of its proper divisors (136382542554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111312221022 is a wasteful number, since it uses less digits than its factorization.

111312221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167135512 (or 167135509 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 111312221022 its reverse (220122213111), we get a palindrome (331434434133).

The spelling of 111312221022 in words is "one hundred eleven billion, three hundred twelve million, two hundred twenty-one thousand, twenty-two".