111201002120 has 64 divisors (see below), whose sum is σ = 271920726000. Its totient is φ = 40682124288.

The previous prime is 111201002119. The next prime is 111201002141. The reversal of 111201002120 is 21200102111.

It can be written as a sum of positive squares in 8 ways, for example, as 30673319044 + 80527683076 = 175138^2 + 283774^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924275 + ... + 1037634.

Almost surely, 2^111201002120 is an apocalyptic number.

111201002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201002120 is an abundant number, since it is smaller than the sum of its proper divisors (160719723880).

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

111201002120 is a wasteful number, since it uses less digits than its factorization.

111201002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962042 (or 1962038 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111201002120 its reverse (21200102111), we get a palindrome (132401104231).

Subtracting from 111201002120 its reverse (21200102111), we obtain a palindrome (90000900009).

The spelling of 111201002120 in words is "one hundred eleven billion, two hundred one million, two thousand, one hundred twenty".