113256562021 has 4 divisors (see below), whose sum is σ = 113260201344. Its totient is φ = 113252922700.

The previous prime is 113256562009. The next prime is 113256562037. The reversal of 113256562021 is 120265652311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 113256562021 - 2⁷ = 113256561893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113256565021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1772575 + ... + 1835356.

It is an arithmetic number, because the mean of its divisors is an integer number (28315050336).

Almost surely, 2^113256562021 is an apocalyptic number.

It is an amenable number.

113256562021 is a deficient number, since it is larger than the sum of its proper divisors (3639323).

113256562021 is an equidigital number, since it uses as much as digits as its factorization.

113256562021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639322.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 113256562021 in words is "one hundred thirteen billion, two hundred fifty-six million, five hundred sixty-two thousand, twenty-one".