111121002220 has 24 divisors (see below), whose sum is σ = 234785731824. Its totient is φ = 44175710016.

The previous prime is 111121002191. The next prime is 111121002233. The reversal of 111121002220 is 22200121111.

It is a self number, because there is not a number n which added to its sum of digits gives 111121002220.

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, 17039839 + ... + 17046358.

It is an arithmetic number, because the mean of its divisors is an integer number (9782738826).

Almost surely, 2^111121002220 is an apocalyptic number.

111121002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121002220 is an abundant number, since it is smaller than the sum of its proper divisors (123664729604).

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

111121002220 is a wasteful number, since it uses less digits than its factorization.

111121002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34086369 (or 34086367 counting only the distinct ones).

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

Adding to 111121002220 its reverse (22200121111), we get a palindrome (133321123331).

The spelling of 111121002220 in words is "one hundred eleven billion, one hundred twenty-one million, two thousand, two hundred twenty".