12221000639 has 2 divisors, whose sum is σ = 12221000640. Its totient is φ = 12221000638.

The previous prime is 12221000633. The next prime is 12221000683. The reversal of 12221000639 is 93600012221.

It is a weak prime.

It is an emirp because it is prime and its reverse (93600012221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12221000639 - 2⁸ = 12221000383 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221000633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110500319 + 6110500320.

It is an arithmetic number, because the mean of its divisors is an integer number (6110500320).

Almost surely, 2^12221000639 is an apocalyptic number.

12221000639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221000639 is an equidigital number, since it uses as much as digits as its factorization.

12221000639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 12221000639 in words is "twelve billion, two hundred twenty-one million, six hundred thirty-nine", and thus it is an aban number.