12641306421 has 16 divisors (see below), whose sum is σ = 16957878336. Its totient is φ = 8376216576.

The previous prime is 12641306417. The next prime is 12641306441. The reversal of 12641306421 is 12460314621.

It is not a de Polignac number, because 12641306421 - 2² = 12641306417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12641306441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 663991 + ... + 682763.

It is an arithmetic number, because the mean of its divisors is an integer number (1059867396).

Almost surely, 2^12641306421 is an apocalyptic number.

It is an amenable number.

12641306421 is a deficient number, since it is larger than the sum of its proper divisors (4316571915).

12641306421 is a wasteful number, since it uses less digits than its factorization.

12641306421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20132.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 12641306421 in words is "twelve billion, six hundred forty-one million, three hundred six thousand, four hundred twenty-one".