12630868221 has 4 divisors (see below), whose sum is σ = 16841157632. Its totient is φ = 8420578812.

The previous prime is 12630868213. The next prime is 12630868277. The reversal of 12630868221 is 12286803621.

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.

It is not a de Polignac number, because 12630868221 - 2³ = 12630868213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12630868221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12630866221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2105144701 + ... + 2105144706.

It is an arithmetic number, because the mean of its divisors is an integer number (4210289408).

Almost surely, 2^12630868221 is an apocalyptic number.

It is an amenable number.

12630868221 is a deficient number, since it is larger than the sum of its proper divisors (4210289411).

12630868221 is an equidigital number, since it uses as much as digits as its factorization.

12630868221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210289410.

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 12630868221 in words is "twelve billion, six hundred thirty million, eight hundred sixty-eight thousand, two hundred twenty-one".