20210011011979 has 2 divisors, whose sum is σ = 20210011011980. Its totient is φ = 20210011011978.

The previous prime is 20210011011977. The next prime is 20210011012027. The reversal of 20210011011979 is 97911011001202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20210011011979 - 2¹ = 20210011011977 is a prime.

Together with 20210011011977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20210011011977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105005505989 + 10105005505990.

It is an arithmetic number, because the mean of its divisors is an integer number (10105005505990).

Almost surely, 2^{20210011011979} is an apocalyptic number.

20210011011979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210011011979 is an equidigital number, since it uses as much as digits as its factorization.

20210011011979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 34.

The spelling of 20210011011979 in words is "twenty trillion, two hundred ten billion, eleven million, eleven thousand, nine hundred seventy-nine".