12921407004 has 48 divisors (see below), whose sum is σ = 32907885696. Its totient is φ = 3913550400.

The previous prime is 12921407003. The next prime is 12921407063. The reversal of 12921407004 is 40070412921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12921407003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241114 + ... + 289790.

It is an arithmetic number, because the mean of its divisors is an integer number (685580952).

Almost surely, 2^12921407004 is an apocalyptic number.

It is an amenable number.

12921407004 is an abundant number, since it is smaller than the sum of its proper divisors (19986478692).

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

12921407004 is a wasteful number, since it uses less digits than its factorization.

12921407004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50706 (or 50704 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

Adding to 12921407004 its reverse (40070412921), we get a palindrome (52991819925).

The spelling of 12921407004 in words is "twelve billion, nine hundred twenty-one million, four hundred seven thousand, four".