111220211100120 has 32 divisors (see below), whose sum is σ = 333660633300720. Its totient is φ = 29658722960000.

The previous prime is 111220211100067. The next prime is 111220211100157. The reversal of 111220211100120 is 21001112022111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111220211100120.

It is a congruent number.

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, 463417546131 + ... + 463417546370.

Almost surely, 2^{111220211100120} is an apocalyptic number.

111220211100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111220211100120 is an abundant number, since it is smaller than the sum of its proper divisors (222440422200600).

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

111220211100120 is a wasteful number, since it uses less digits than its factorization.

111220211100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926835092515 (or 926835092511 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111220211100120 its reverse (21001112022111), we get a palindrome (132221323122231).

The spelling of 111220211100120 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred eleven million, one hundred thousand, one hundred twenty".