111111120020220 has 96 divisors (see below), whose sum is σ = 314154875496000. Its totient is φ = 29340080216064.

The previous prime is 111111120020213. The next prime is 111111120020261. The reversal of 111111120020220 is 22020021111111.

It is a happy number.

111111120020220 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 111111120020220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5710206 + ... + 15963354.

It is an arithmetic number, because the mean of its divisors is an integer number (3272446619750).

Almost surely, 2^{111111120020220} is an apocalyptic number.

111111120020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111111120020220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157077437748000).

111111120020220 is an abundant number, since it is smaller than the sum of its proper divisors (203043755475780).

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

111111120020220 is a wasteful number, since it uses less digits than its factorization.

111111120020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10254927 (or 10254925 counting only the distinct ones).

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

Adding to 111111120020220 its reverse (22020021111111), we get a palindrome (133131141131331).

The spelling of 111111120020220 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty million, twenty thousand, two hundred twenty".