117971321215 has 16 divisors (see below), whose sum is σ = 154802043936. Its totient is φ = 85593513600.

The previous prime is 117971321203. The next prime is 117971321227. The reversal of 117971321215 is 512123179711.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (117971321203) and next prime (117971321227).

It is not a de Polignac number, because 117971321215 - 2¹⁵ = 117971288447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2524272 + ... + 2570581.

It is an arithmetic number, because the mean of its divisors is an integer number (9675127746).

Almost surely, 2^117971321215 is an apocalyptic number.

117971321215 is a deficient number, since it is larger than the sum of its proper divisors (36830722721).

117971321215 is a wasteful number, since it uses less digits than its factorization.

117971321215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5095290.

The product of its digits is 26460, while the sum is 40.

The spelling of 117971321215 in words is "one hundred seventeen billion, nine hundred seventy-one million, three hundred twenty-one thousand, two hundred fifteen".