113117579716821 has 4 divisors (see below), whose sum is σ = 150823439622432. Its totient is φ = 75411719811212.

The previous prime is 113117579716811. The next prime is 113117579716831. The reversal of 113117579716821 is 128617975711311.

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 an interprime number because it is at equal distance from previous prime (113117579716811) and next prime (113117579716831).

It is a cyclic number.

It is not a de Polignac number, because 113117579716821 - 2²⁵ = 113117546162389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113117579716811) 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, 18852929952801 + ... + 18852929952806.

It is an arithmetic number, because the mean of its divisors is an integer number (37705859905608).

Almost surely, 2^{113117579716821} is an apocalyptic number.

It is an amenable number.

113117579716821 is a deficient number, since it is larger than the sum of its proper divisors (37705859905611).

113117579716821 is an equidigital number, since it uses as much as digits as its factorization.

113117579716821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37705859905610.

The product of its digits is 4445280, while the sum is 60.

The spelling of 113117579716821 in words is "one hundred thirteen trillion, one hundred seventeen billion, five hundred seventy-nine million, seven hundred sixteen thousand, eight hundred twenty-one".