111112111220220 has 144 divisors (see below), whose sum is σ = 367846688821248. Its totient is φ = 26924063402880.

The previous prime is 111112111220179. The next prime is 111112111220221. The reversal of 111112111220220 is 22022111211111.

It is a happy number.

111112111220220 is a `hidden beast` number, since 1 + 1 + 1 + 11 + 211 + 1 + 220 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111112111220193 and 111112111220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112111220221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8343604 + ... + 17083323.

It is an arithmetic number, because the mean of its divisors is an integer number (2554490894592).

Almost surely, 2^{111112111220220} is an apocalyptic number.

111112111220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111112111220220 is an abundant number, since it is smaller than the sum of its proper divisors (256734577601028).

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

111112111220220 is a wasteful number, since it uses less digits than its factorization.

111112111220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25429160 (or 25429155 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111112111220220 its reverse (22022111211111), we get a palindrome (133134222431331).

The spelling of 111112111220220 in words is "one hundred eleven trillion, one hundred twelve billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty".