22211221211 has 2 divisors, whose sum is σ = 22211221212. Its totient is φ = 22211221210.

The previous prime is 22211221199. The next prime is 22211221229. The reversal of 22211221211 is 11212211222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22211221211 - 2³⁰ = 21137479387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22211221211.

It is not a weakly prime, because it can be changed into another prime (22211221111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105610605 + 11105610606.

It is an arithmetic number, because the mean of its divisors is an integer number (11105610606).

Almost surely, 2^22211221211 is an apocalyptic number.

22211221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211221211 is an equidigital number, since it uses as much as digits as its factorization.

22211221211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64, while the sum is 17.

Adding to 22211221211 its reverse (11212211222), we get a palindrome (33423432433).

The spelling of 22211221211 in words is "twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, two hundred eleven".