111112221020 has 48 divisors (see below), whose sum is σ = 242676321888. Its totient is φ = 42699605760.

The previous prime is 111112220993. The next prime is 111112221043. The reversal of 111112221020 is 20122211111.

It is a junction number, because it is equal to n+sod(n) for n = 111112220986 and 111112221004.

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 15 ways as a sum of consecutive naturals, for example, 1006559 + ... + 1111478.

It is an arithmetic number, because the mean of its divisors is an integer number (5055756706).

Almost surely, 2^111112221020 is an apocalyptic number.

111112221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111112221020 is an abundant number, since it is smaller than the sum of its proper divisors (131564100868).

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

111112221020 is a wasteful number, since it uses less digits than its factorization.

111112221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118150 (or 2118148 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111112221020 its reverse (20122211111), we get a palindrome (131234432131).

Subtracting from 111112221020 its reverse (20122211111), we obtain a palindrome (90990009909).

The spelling of 111112221020 in words is "one hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, twenty".