201321001979 has 2 divisors, whose sum is σ = 201321001980. Its totient is φ = 201321001978.

The previous prime is 201321001969. The next prime is 201321002021. The reversal of 201321001979 is 979100123102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201321001979 - 2²⁴ = 201304224763 is a prime.

It is not a weakly prime, because it can be changed into another prime (201321001969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100660500989 + 100660500990.

It is an arithmetic number, because the mean of its divisors is an integer number (100660500990).

Almost surely, 2^201321001979 is an apocalyptic number.

201321001979 is a deficient number, since it is larger than the sum of its proper divisors (1).

201321001979 is an equidigital number, since it uses as much as digits as its factorization.

201321001979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The spelling of 201321001979 in words is "two hundred one billion, three hundred twenty-one million, one thousand, nine hundred seventy-nine".