111001122220 has 24 divisors (see below), whose sum is σ = 233727311664. Its totient is φ = 44281409856.

The previous prime is 111001122203. The next prime is 111001122233. The reversal of 111001122220 is 22221100111.

It is a self number, because there is not a number n which added to its sum of digits gives 111001122220.

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, 7432294 + ... + 7447213.

It is an arithmetic number, because the mean of its divisors is an integer number (9738637986).

Almost surely, 2^111001122220 is an apocalyptic number.

111001122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111001122220 is an abundant number, since it is smaller than the sum of its proper divisors (122726189444).

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

111001122220 is a wasteful number, since it uses less digits than its factorization.

111001122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14879889 (or 14879887 counting only the distinct ones).

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

Adding to 111001122220 its reverse (22221100111), we get a palindrome (133222222331).

The spelling of 111001122220 in words is "one hundred eleven billion, one million, one hundred twenty-two thousand, two hundred twenty".