12959385921 has 12 divisors (see below), whose sum is σ = 18720105040. Its totient is φ = 8639132760.

The previous prime is 12959385919. The next prime is 12959385937. The reversal of 12959385921 is 12958395921.

It is a happy number.

12959385921 is a `hidden beast` number, since 1 + 29 + 593 + 8 + 5 + 9 + 21 = 666.

It is not a de Polignac number, because 12959385921 - 2¹ = 12959385919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12959385521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286470 + ... + 328608.

Almost surely, 2^12959385921 is an apocalyptic number.

It is an amenable number.

12959385921 is a deficient number, since it is larger than the sum of its proper divisors (5760719119).

12959385921 is a wasteful number, since it uses less digits than its factorization.

12959385921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76316 (or 76313 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 54.

The spelling of 12959385921 in words is "twelve billion, nine hundred fifty-nine million, three hundred eighty-five thousand, nine hundred twenty-one".