111220111220 has 96 divisors (see below), whose sum is σ = 242303999616. Its totient is φ = 42863040000.

The previous prime is 111220111217. The next prime is 111220111231. The reversal of 111220111220 is 22111022111.

It is a junction number, because it is equal to n+sod(n) for n = 111220111195 and 111220111204.

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, 11228270 + ... + 11238170.

It is an arithmetic number, because the mean of its divisors is an integer number (2523999996).

Almost surely, 2^111220111220 is an apocalyptic number.

111220111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111220111220 is an abundant number, since it is smaller than the sum of its proper divisors (131083888396).

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

111220111220 is a wasteful number, since it uses less digits than its factorization.

111220111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10161 (or 10159 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111220111220 its reverse (22111022111), we get a palindrome (133331133331).

The spelling of 111220111220 in words is "one hundred eleven billion, two hundred twenty million, one hundred eleven thousand, two hundred twenty".