2022021021991 has 2 divisors, whose sum is σ = 2022021021992. Its totient is φ = 2022021021990.

The previous prime is 2022021021967. The next prime is 2022021022097. The reversal of 2022021021991 is 1991201202202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2022021021991 - 2⁵ = 2022021021959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2022021022991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1011010510995 + 1011010510996.

It is an arithmetic number, because the mean of its divisors is an integer number (1011010510996).

Almost surely, 2^{2022021021991} is an apocalyptic number.

2022021021991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2022021021991 is an equidigital number, since it uses as much as digits as its factorization.

2022021021991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 2022021021991 in words is "two trillion, twenty-two billion, twenty-one million, twenty-one thousand, nine hundred ninety-one".