117212809920 has 112 divisors (see below), whose sum is σ = 375565233120. Its totient is φ = 30969962496.

The previous prime is 117212809919. The next prime is 117212809927. The reversal of 117212809920 is 29908212711.

117212809920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (117212809927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455437 + ... + 664716.

It is an arithmetic number, because the mean of its divisors is an integer number (3353261010).

Almost surely, 2^117212809920 is an apocalyptic number.

117212809920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117212809920 is an abundant number, since it is smaller than the sum of its proper divisors (258352423200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117212809920 is a wasteful number, since it uses less digits than its factorization.

117212809920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120282 (or 1120272 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The spelling of 117212809920 in words is "one hundred seventeen billion, two hundred twelve million, eight hundred nine thousand, nine hundred twenty".