20221022011691 has 2 divisors, whose sum is σ = 20221022011692. Its totient is φ = 20221022011690.

The previous prime is 20221022011667. The next prime is 20221022011693. The reversal of 20221022011691 is 19611022012202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20221022011691 - 2³⁰ = 20219948269867 is a prime.

It is a Sophie Germain prime.

Together with 20221022011693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20221022011693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110511005845 + 10110511005846.

It is an arithmetic number, because the mean of its divisors is an integer number (10110511005846).

Almost surely, 2^{20221022011691} is an apocalyptic number.

20221022011691 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221022011691 is an equidigital number, since it uses as much as digits as its factorization.

20221022011691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

Adding to 20221022011691 its reverse (19611022012202), we get a palindrome (39832044023893).

The spelling of 20221022011691 in words is "twenty trillion, two hundred twenty-one billion, twenty-two million, eleven thousand, six hundred ninety-one".