111121102120 has 64 divisors (see below), whose sum is σ = 287336419200. Its totient is φ = 37885804800.

The previous prime is 111121102117. The next prime is 111121102153. The reversal of 111121102120 is 21201121111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 111121102120.

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, 1058431 + ... + 1158670.

It is an arithmetic number, because the mean of its divisors is an integer number (4489631550).

Almost surely, 2^111121102120 is an apocalyptic number.

111121102120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121102120 is an abundant number, since it is smaller than the sum of its proper divisors (176215317080).

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

111121102120 is a wasteful number, since it uses less digits than its factorization.

111121102120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217298 (or 2217294 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111121102120 its reverse (21201121111), we get a palindrome (132322223231).

The spelling of 111121102120 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred two thousand, one hundred twenty".