111221110120 has 32 divisors (see below), whose sum is σ = 261127825920. Its totient is φ = 42554163520.

The previous prime is 111221110079. The next prime is 111221110181. The reversal of 111221110120 is 21011122111.

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 111221110120.

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, 60445336 + ... + 60447175.

It is an arithmetic number, because the mean of its divisors is an integer number (8160244560).

Almost surely, 2^111221110120 is an apocalyptic number.

111221110120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221110120 is an abundant number, since it is smaller than the sum of its proper divisors (149906715800).

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

111221110120 is a wasteful number, since it uses less digits than its factorization.

111221110120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120892545 (or 120892541 counting only the distinct ones).

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

Adding to 111221110120 its reverse (21011122111), we get a palindrome (132232232231).

The spelling of 111221110120 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred ten thousand, one hundred twenty".