111111122222120 has 64 divisors (see below), whose sum is σ = 254664309258000. Its totient is φ = 43618488238080.

The previous prime is 111111122222033. The next prime is 111111122222183. The reversal of 111111122222120 is 21222221111111.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4564093867876 + 106547028354244 = 2136374^2 + 10322162^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111111122222092 and 111111122222101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49614179 + ... + 51805298.

Almost surely, 2^{111111122222120} is an apocalyptic number.

111111122222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111122222120 is an abundant number, since it is smaller than the sum of its proper divisors (143553187035880).

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

111111122222120 is a wasteful number, since it uses less digits than its factorization.

111111122222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101419998 (or 101419994 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111111122222120 its reverse (21222221111111), we get a palindrome (132333343333231).

The spelling of 111111122222120 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty".