113221112020 has 24 divisors (see below), whose sum is σ = 237809956104. Its totient is φ = 45279755136.

The previous prime is 113221112003. The next prime is 113221112027. The reversal of 113221112020 is 20211122311.

It can be written as a sum of positive squares in 4 ways, for example, as 53285258896 + 59935853124 = 230836^2 + 244818^2 .

It is a junction number, because it is equal to n+sod(n) for n = 113221111985 and 113221112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113221112027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435747 + ... + 645226.

It is an arithmetic number, because the mean of its divisors is an integer number (9908748171).

Almost surely, 2^113221112020 is an apocalyptic number.

113221112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113221112020 is an abundant number, since it is smaller than the sum of its proper divisors (124588844084).

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

113221112020 is a wasteful number, since it uses less digits than its factorization.

113221112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086219 (or 1086217 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 113221112020 its reverse (20211122311), we get a palindrome (133432234331).

The spelling of 113221112020 in words is "one hundred thirteen billion, two hundred twenty-one million, one hundred twelve thousand, twenty".