12921423868 has 12 divisors (see below), whose sum is σ = 22643095720. Its totient is φ = 6451967952.

The previous prime is 12921423829. The next prime is 12921423871. The reversal of 12921423868 is 86832412921.

12921423868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2182671 + ... + 2188582.

Almost surely, 2^12921423868 is an apocalyptic number.

It is an amenable number.

12921423868 is a deficient number, since it is larger than the sum of its proper divisors (9721671852).

12921423868 is a wasteful number, since it uses less digits than its factorization.

12921423868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371996 (or 4371994 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The spelling of 12921423868 in words is "twelve billion, nine hundred twenty-one million, four hundred twenty-three thousand, eight hundred sixty-eight".