12921208404 has 48 divisors (see below), whose sum is σ = 32499983040. Its totient is φ = 3971923200.

The previous prime is 12921208397. The next prime is 12921208423. The reversal of 12921208404 is 40480212921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124552 + ... + 203360.

It is an arithmetic number, because the mean of its divisors is an integer number (677082980).

Almost surely, 2^12921208404 is an apocalyptic number.

It is an amenable number.

12921208404 is an abundant number, since it is smaller than the sum of its proper divisors (19578774636).

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

12921208404 is a wasteful number, since it uses less digits than its factorization.

12921208404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79880 (or 79878 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 12921208404 in words is "twelve billion, nine hundred twenty-one million, two hundred eight thousand, four hundred four".