22111111811 has 2 divisors, whose sum is σ = 22111111812. Its totient is φ = 22111111810.

The previous prime is 22111111807. The next prime is 22111111819. The reversal of 22111111811 is 11811111122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22111111811 - 2² = 22111111807 is a prime.

It is not a weakly prime, because it can be changed into another prime (22111111819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055555905 + 11055555906.

It is an arithmetic number, because the mean of its divisors is an integer number (11055555906).

Almost surely, 2^22111111811 is an apocalyptic number.

22111111811 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111111811 is an equidigital number, since it uses as much as digits as its factorization.

22111111811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 20.

Adding to 22111111811 its reverse (11811111122), we get a palindrome (33922222933).

The spelling of 22111111811 in words is "twenty-two billion, one hundred eleven million, one hundred eleven thousand, eight hundred eleven".