201021100119979 has 2 divisors, whose sum is σ = 201021100119980. Its totient is φ = 201021100119978.

The previous prime is 201021100119977. The next prime is 201021100119989. The reversal of 201021100119979 is 979911001120102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201021100119979 - 2¹ = 201021100119977 is a prime.

It is a super-2 number, since 2×201021100119979² (a number of 29 digits) contains 22 as substring.

Together with 201021100119977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (201021100119977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510550059989 + 100510550059990.

It is an arithmetic number, because the mean of its divisors is an integer number (100510550059990).

Almost surely, 2^{201021100119979} is an apocalyptic number.

201021100119979 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021100119979 is an equidigital number, since it uses as much as digits as its factorization.

201021100119979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 43.

The spelling of 201021100119979 in words is "two hundred one trillion, twenty-one billion, one hundred million, one hundred nineteen thousand, nine hundred seventy-nine".