20122021101979 has 2 divisors, whose sum is σ = 20122021101980. Its totient is φ = 20122021101978.

The previous prime is 20122021101943. The next prime is 20122021102039. The reversal of 20122021101979 is 97910112022102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20122021101979 - 2¹¹ = 20122021099931 is a prime.

It is not a weakly prime, because it can be changed into another prime (20122021101929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061010550989 + 10061010550990.

It is an arithmetic number, because the mean of its divisors is an integer number (10061010550990).

Almost surely, 2^{20122021101979} is an apocalyptic number.

20122021101979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122021101979 is an equidigital number, since it uses as much as digits as its factorization.

20122021101979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

The spelling of 20122021101979 in words is "twenty trillion, one hundred twenty-two billion, twenty-one million, one hundred one thousand, nine hundred seventy-nine".