2002031221979 has 2 divisors, whose sum is σ = 2002031221980. Its totient is φ = 2002031221978.

The previous prime is 2002031221963. The next prime is 2002031222003. The reversal of 2002031221979 is 9791221302002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2002031221979 - 2⁴ = 2002031221963 is a prime.

It is not a weakly prime, because it can be changed into another prime (2002031227979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001015610989 + 1001015610990.

It is an arithmetic number, because the mean of its divisors is an integer number (1001015610990).

Almost surely, 2^{2002031221979} is an apocalyptic number.

2002031221979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002031221979 is an equidigital number, since it uses as much as digits as its factorization.

2002031221979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 2002031221979 in words is "two trillion, two billion, thirty-one million, two hundred twenty-one thousand, nine hundred seventy-nine".