12630939221 has 4 divisors (see below), whose sum is σ = 12631164000. Its totient is φ = 12630714444.

The previous prime is 12630939179. The next prime is 12630939229. The reversal of 12630939221 is 12293903621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12293903621 = 19 ⋅647047559.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12630939221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12630939229) 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 3 ways as a sum of consecutive naturals, for example, 55310 + ... + 168288.

It is an arithmetic number, because the mean of its divisors is an integer number (3157791000).

Almost surely, 2^12630939221 is an apocalyptic number.

It is an amenable number.

12630939221 is a deficient number, since it is larger than the sum of its proper divisors (224779).

12630939221 is a wasteful number, since it uses less digits than its factorization.

12630939221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224778.

The product of its (nonzero) digits is 34992, while the sum is 38.

The spelling of 12630939221 in words is "twelve billion, six hundred thirty million, nine hundred thirty-nine thousand, two hundred twenty-one".