111220022220 has 384 divisors, whose sum is σ = 357422284800. Its totient is φ = 25687968768.

The previous prime is 111220022209. The next prime is 111220022297. The reversal of 111220022220 is 22220022111.

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 111220022220.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 81359977 + ... + 81361343.

It is an arithmetic number, because the mean of its divisors is an integer number (930787200).

Almost surely, 2^111220022220 is an apocalyptic number.

111220022220 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 111220022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178711142400).

111220022220 is an abundant number, since it is smaller than the sum of its proper divisors (246202262580).

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

111220022220 is a wasteful number, since it uses less digits than its factorization.

111220022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557 (or 1555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 111220022220 its reverse (22220022111), we get a palindrome (133440044331).

The spelling of 111220022220 in words is "one hundred eleven billion, two hundred twenty million, twenty-two thousand, two hundred twenty".