12630521421 has 12 divisors (see below), whose sum is σ = 20850384672. Its totient is φ = 7217440776.

The previous prime is 12630521413. The next prime is 12630521437. The reversal of 12630521421 is 12412503621.

12630521421 is a `hidden beast` number, since 1 + 2 + 630 + 5 + 2 + 1 + 4 + 21 = 666.

It is not a de Polignac number, because 12630521421 - 2³ = 12630521413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12630521471) 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 11 ways as a sum of consecutive naturals, for example, 100242171 + ... + 100242296.

It is an arithmetic number, because the mean of its divisors is an integer number (1737532056).

Almost surely, 2^12630521421 is an apocalyptic number.

It is an amenable number.

12630521421 is a deficient number, since it is larger than the sum of its proper divisors (8219863251).

12630521421 is a wasteful number, since it uses less digits than its factorization.

12630521421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200484480 (or 200484477 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The spelling of 12630521421 in words is "twelve billion, six hundred thirty million, five hundred twenty-one thousand, four hundred twenty-one".