202220221979 has 2 divisors, whose sum is σ = 202220221980. Its totient is φ = 202220221978.

The previous prime is 202220221969. The next prime is 202220222047. The reversal of 202220221979 is 979122022202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202220221979 is a prime.

It is not a weakly prime, because it can be changed into another prime (202220221969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110110989 + 101110110990.

It is an arithmetic number, because the mean of its divisors is an integer number (101110110990).

Almost surely, 2^202220221979 is an apocalyptic number.

202220221979 is a deficient number, since it is larger than the sum of its proper divisors (1).

202220221979 is an equidigital number, since it uses as much as digits as its factorization.

202220221979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 202220221979 in words is "two hundred two billion, two hundred twenty million, two hundred twenty-one thousand, nine hundred seventy-nine".