111220101220 has 24 divisors (see below), whose sum is σ = 234323014464. Its totient is φ = 44343125856.

The previous prime is 111220101217. The next prime is 111220101233. The reversal of 111220101220 is 22101022111.

It is a self number, because there is not a number n which added to its sum of digits gives 111220101220.

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, 9050872 + ... + 9063151.

It is an arithmetic number, because the mean of its divisors is an integer number (9763458936).

Almost surely, 2^111220101220 is an apocalyptic number.

111220101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111220101220 is an abundant number, since it is smaller than the sum of its proper divisors (123102913244).

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

111220101220 is a wasteful number, since it uses less digits than its factorization.

111220101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18114339 (or 18114337 counting only the distinct ones).

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

Adding to 111220101220 its reverse (22101022111), we get a palindrome (133321123331).

The spelling of 111220101220 in words is "one hundred eleven billion, two hundred twenty million, one hundred one thousand, two hundred twenty".