111021022120 has 32 divisors (see below), whose sum is σ = 264491260200. Its totient is φ = 41796149248.

The previous prime is 111021022109. The next prime is 111021022139. The reversal of 111021022120 is 21220120111.

It can be written as a sum of positive squares in 4 ways, for example, as 74897458276 + 36123563844 = 273674^2 + 190062^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111021022120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81632425 + ... + 81633784.

Almost surely, 2^111021022120 is an apocalyptic number.

111021022120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021022120 is an abundant number, since it is smaller than the sum of its proper divisors (153470238080).

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

111021022120 is a wasteful number, since it uses less digits than its factorization.

111021022120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163266237 (or 163266233 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111021022120 its reverse (21220120111), we get a palindrome (132241142231).

The spelling of 111021022120 in words is "one hundred eleven billion, twenty-one million, twenty-two thousand, one hundred twenty".