202221111999979 has 2 divisors, whose sum is σ = 202221111999980. Its totient is φ = 202221111999978.

The previous prime is 202221111999971. The next prime is 202221112000049. The reversal of 202221111999979 is 979999111122202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202221111999979 - 2³ = 202221111999971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202221111999979.

It is not a weakly prime, because it can be changed into another prime (202221111999971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110555999989 + 101110555999990.

It is an arithmetic number, because the mean of its divisors is an integer number (101110555999990).

Almost surely, 2^{202221111999979} is an apocalyptic number.

202221111999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

202221111999979 is an equidigital number, since it uses as much as digits as its factorization.

202221111999979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6613488, while the sum is 64.

The spelling of 202221111999979 in words is "two hundred two trillion, two hundred twenty-one billion, one hundred eleven million, nine hundred ninety-nine thousand, nine hundred seventy-nine".