22108811 has 2 divisors, whose sum is σ = 22108812. Its totient is φ = 22108810.

The previous prime is 22108783. The next prime is 22108813. The reversal of 22108811 is 11880122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22108811 is a prime.

It is a Sophie Germain prime.

Together with 22108813, 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 (22108813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11054405 + 11054406.

It is an arithmetic number, because the mean of its divisors is an integer number (11054406).

Almost surely, 2^22108811 is an apocalyptic number.

22108811 is a deficient number, since it is larger than the sum of its proper divisors (1).

22108811 is an equidigital number, since it uses as much as digits as its factorization.

22108811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 22108811 is about 4702.0007443640. Note that the first 3 decimals coincide. The cubic root of 22108811 is about 280.6651321814.

Adding to 22108811 its reverse (11880122), we get a palindrome (33988933).

The spelling of 22108811 in words is "twenty-two million, one hundred eight thousand, eight hundred eleven".