117357371521 has 4 divisors (see below), whose sum is σ = 126384861652. Its totient is φ = 108329881392.

The previous prime is 117357371519. The next prime is 117357371581. The reversal of 117357371521 is 125173753711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125173753711 = 17 ⋅7363161983.

It can be written as a sum of positive squares in 2 ways, for example, as 77542756225 + 39814615296 = 278465^2 + 199536^2 .

It is a cyclic number.

It is not a de Polignac number, because 117357371521 - 2¹ = 117357371519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117357371581) 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, 4513745046 + ... + 4513745071.

It is an arithmetic number, because the mean of its divisors is an integer number (31596215413).

Almost surely, 2^117357371521 is an apocalyptic number.

It is an amenable number.

117357371521 is a deficient number, since it is larger than the sum of its proper divisors (9027490131).

117357371521 is an equidigital number, since it uses as much as digits as its factorization.

117357371521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9027490130.

The product of its digits is 154350, while the sum is 43.

The spelling of 117357371521 in words is "one hundred seventeen billion, three hundred fifty-seven million, three hundred seventy-one thousand, five hundred twenty-one".