22221211979 has 2 divisors, whose sum is σ = 22221211980. Its totient is φ = 22221211978.

The previous prime is 22221211967. The next prime is 22221212017. The reversal of 22221211979 is 97911212222.

It is an a-pointer prime, because the next prime (22221212017) can be obtained adding 22221211979 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22221211979 - 2⁴ = 22221211963 is a prime.

It is not a weakly prime, because it can be changed into another prime (22221211919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110605989 + 11110605990.

It is an arithmetic number, because the mean of its divisors is an integer number (11110605990).

Almost surely, 2^22221211979 is an apocalyptic number.

22221211979 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221211979 is an equidigital number, since it uses as much as digits as its factorization.

22221211979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The spelling of 22221211979 in words is "twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, nine hundred seventy-nine".