117917222064721 has 4 divisors (see below), whose sum is σ = 117920964193344. Its totient is φ = 117913479936100.

The previous prime is 117917222064713. The next prime is 117917222064727. The reversal of 117917222064721 is 127460222719711.

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 117917222064721 - 2³ = 117917222064713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117917222064727) 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, 1871017045 + ... + 1871080066.

It is an arithmetic number, because the mean of its divisors is an integer number (29480241048336).

Almost surely, 2^{117917222064721} is an apocalyptic number.

It is an amenable number.

117917222064721 is a deficient number, since it is larger than the sum of its proper divisors (3742128623).

117917222064721 is an equidigital number, since it uses as much as digits as its factorization.

117917222064721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742128622.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The spelling of 117917222064721 in words is "one hundred seventeen trillion, nine hundred seventeen billion, two hundred twenty-two million, sixty-four thousand, seven hundred twenty-one".