113112221220 has 72 divisors (see below), whose sum is σ = 352380255864. Its totient is φ = 29348034048.

The previous prime is 113112221177. The next prime is 113112221221. The reversal of 113112221220 is 22122211311.

113112221220 is a `hidden beast` number, since 11 + 311 + 222 + 122 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 32242511844 + 80869709376 = 179562^2 + 284376^2 .

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 = 113112221193 and 113112221202.

It is not an unprimeable number, because it can be changed into a prime (113112221221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8485249 + ... + 8498568.

Almost surely, 2^113112221220 is an apocalyptic number.

113112221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113112221220 is an abundant number, since it is smaller than the sum of its proper divisors (239268034644).

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

113112221220 is a wasteful number, since it uses less digits than its factorization.

113112221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16983869 (or 16983864 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 113112221220 its reverse (22122211311), we get a palindrome (135234432531).

Subtracting from 113112221220 its reverse (22122211311), we obtain a palindrome (90990009909).

The spelling of 113112221220 in words is "one hundred thirteen billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty".