201021339979 has 2 divisors, whose sum is σ = 201021339980. Its totient is φ = 201021339978.

The previous prime is 201021339977. The next prime is 201021340027. The reversal of 201021339979 is 979933120102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201021339979 - 2¹ = 201021339977 is a prime.

Together with 201021339977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (201021339977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510669989 + 100510669990.

It is an arithmetic number, because the mean of its divisors is an integer number (100510669990).

Almost surely, 2^201021339979 is an apocalyptic number.

201021339979 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021339979 is an equidigital number, since it uses as much as digits as its factorization.

201021339979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 46.

The spelling of 201021339979 in words is "two hundred one billion, twenty-one million, three hundred thirty-nine thousand, nine hundred seventy-nine".