12221322979 has 2 divisors, whose sum is σ = 12221322980. Its totient is φ = 12221322978.

The previous prime is 12221322943. The next prime is 12221322991. The reversal of 12221322979 is 97922312221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12221322979 - 2²¹ = 12219225827 is a prime.

It is not a weakly prime, because it can be changed into another prime (12221325979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110661489 + 6110661490.

It is an arithmetic number, because the mean of its divisors is an integer number (6110661490).

Almost surely, 2^12221322979 is an apocalyptic number.

12221322979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221322979 is an equidigital number, since it uses as much as digits as its factorization.

12221322979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The spelling of 12221322979 in words is "twelve billion, two hundred twenty-one million, three hundred twenty-two thousand, nine hundred seventy-nine".