22122691 has 2 divisors, whose sum is σ = 22122692. Its totient is φ = 22122690.

The previous prime is 22122689. The next prime is 22122701. The reversal of 22122691 is 19622122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22122691 - 2¹ = 22122689 is a prime.

Together with 22122689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22122601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061345 + 11061346.

It is an arithmetic number, because the mean of its divisors is an integer number (11061346).

Almost surely, 2^22122691 is an apocalyptic number.

22122691 is a deficient number, since it is larger than the sum of its proper divisors (1).

22122691 is an equidigital number, since it uses as much as digits as its factorization.

22122691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 22122691 is about 4703.4764802218. The cubic root of 22122691 is about 280.7238541254.

The spelling of 22122691 in words is "twenty-two million, one hundred twenty-two thousand, six hundred ninety-one".