1000202221979 has 2 divisors, whose sum is σ = 1000202221980. Its totient is φ = 1000202221978.

The previous prime is 1000202221951. The next prime is 1000202222039. The reversal of 1000202221979 is 9791222020001.

It is a weak prime.

It is an emirp because it is prime and its reverse (9791222020001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000202221979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000202227979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500101110989 + 500101110990.

It is an arithmetic number, because the mean of its divisors is an integer number (500101110990).

Almost surely, 2^{1000202221979} is an apocalyptic number.

1000202221979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000202221979 is an equidigital number, since it uses as much as digits as its factorization.

1000202221979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The spelling of 1000202221979 in words is "one trillion, two hundred two million, two hundred twenty-one thousand, nine hundred seventy-nine".