117595217821 has 4 divisors (see below), whose sum is σ = 117596868544. Its totient is φ = 117593567100.

The previous prime is 117595217809. The next prime is 117595217843. The reversal of 117595217821 is 128712595711.

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 117595217821 - 2²¹ = 117593120669 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 (117595217851) 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, 713445 + ... + 862666.

It is an arithmetic number, because the mean of its divisors is an integer number (29399217136).

Almost surely, 2^117595217821 is an apocalyptic number.

It is an amenable number.

117595217821 is a deficient number, since it is larger than the sum of its proper divisors (1650723).

117595217821 is an equidigital number, since it uses as much as digits as its factorization.

117595217821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650722.

The product of its digits is 352800, while the sum is 49.

The spelling of 117595217821 in words is "one hundred seventeen billion, five hundred ninety-five million, two hundred seventeen thousand, eight hundred twenty-one".