113788280021 has 8 divisors (see below), whose sum is σ = 122543903160. Its totient is φ = 105033039552.

The previous prime is 113788280009. The next prime is 113788280027. The reversal of 113788280021 is 120082887311.

It can be written as a sum of positive squares in 4 ways, for example, as 44981743921 + 68806536100 = 212089^2 + 262310^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113788280021 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 (113788280027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926411 + ... + 1042023.

It is an arithmetic number, because the mean of its divisors is an integer number (15317987895).

Almost surely, 2^113788280021 is an apocalyptic number.

It is an amenable number.

113788280021 is a deficient number, since it is larger than the sum of its proper divisors (8755623139).

113788280021 is a wasteful number, since it uses less digits than its factorization.

113788280021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191335.

The product of its (nonzero) digits is 43008, while the sum is 41.

The spelling of 113788280021 in words is "one hundred thirteen billion, seven hundred eighty-eight million, two hundred eighty thousand, twenty-one".