12642473267421 has 24 divisors (see below), whose sum is σ = 17627432621760. Its totient is φ = 8058677136384.

The previous prime is 12642473267399. The next prime is 12642473267449. The reversal of 12642473267421 is 12476237424621.

It is not a de Polignac number, because 12642473267421 - 2⁷ = 12642473267293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642473267461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24064836 + ... + 24584573.

It is an arithmetic number, because the mean of its divisors is an integer number (734476359240).

Almost surely, 2^{12642473267421} is an apocalyptic number.

It is an amenable number.

12642473267421 is a deficient number, since it is larger than the sum of its proper divisors (4984959354339).

12642473267421 is a wasteful number, since it uses less digits than its factorization.

12642473267421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48649573 (or 48649544 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 51.

The spelling of 12642473267421 in words is "twelve trillion, six hundred forty-two billion, four hundred seventy-three million, two hundred sixty-seven thousand, four hundred twenty-one".