21602422060691 has 2 divisors, whose sum is σ = 21602422060692. Its totient is φ = 21602422060690.

The previous prime is 21602422060619. The next prime is 21602422060757. The reversal of 21602422060691 is 19606022420612.

Together with previous prime (21602422060619) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21602422060691 - 2¹⁰ = 21602422059667 is a prime.

It is not a weakly prime, because it can be changed into another prime (21602422060591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10801211030345 + 10801211030346.

It is an arithmetic number, because the mean of its divisors is an integer number (10801211030346).

Almost surely, 2^{21602422060691} is an apocalyptic number.

21602422060691 is a deficient number, since it is larger than the sum of its proper divisors (1).

21602422060691 is an equidigital number, since it uses as much as digits as its factorization.

21602422060691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 21602422060691 in words is "twenty-one trillion, six hundred two billion, four hundred twenty-two million, sixty thousand, six hundred ninety-one".