22020999991 has 2 divisors, whose sum is σ = 22020999992. Its totient is φ = 22020999990.

The previous prime is 22020999977. The next prime is 22021000021. The reversal of 22020999991 is 19999902022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22020999991 - 2²⁷ = 21886782263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22020999901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010499995 + 11010499996.

It is an arithmetic number, because the mean of its divisors is an integer number (11010499996).

Almost surely, 2^22020999991 is an apocalyptic number.

22020999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22020999991 is an equidigital number, since it uses as much as digits as its factorization.

22020999991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 472392, while the sum is 52.

The spelling of 22020999991 in words is "twenty-two billion, twenty million, nine hundred ninety-nine thousand, nine hundred ninety-one".