22021211911 has 2 divisors, whose sum is σ = 22021211912. Its totient is φ = 22021211910.

The previous prime is 22021211909. The next prime is 22021211939. The reversal of 22021211911 is 11911212022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22021211911 - 2¹ = 22021211909 is a prime.

Together with 22021211909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22021211941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010605955 + 11010605956.

It is an arithmetic number, because the mean of its divisors is an integer number (11010605956).

Almost surely, 2^22021211911 is an apocalyptic number.

22021211911 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021211911 is an equidigital number, since it uses as much as digits as its factorization.

22021211911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 22021211911 its reverse (11911212022), we get a palindrome (33932423933).

The spelling of 22021211911 in words is "twenty-two billion, twenty-one million, two hundred eleven thousand, nine hundred eleven".