22221021211 has 16 divisors (see below), whose sum is σ = 23766398208. Its totient is φ = 20730204000.

The previous prime is 22221021191. The next prime is 22221021233. The reversal of 22221021211 is 11212012222.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22221021211 - 2²⁵ = 22187466779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221621211) 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 in 15 ways as a sum of consecutive naturals, for example, 84256 + ... + 227026.

It is an arithmetic number, because the mean of its divisors is an integer number (1485399888).

Almost surely, 2^22221021211 is an apocalyptic number.

22221021211 is a deficient number, since it is larger than the sum of its proper divisors (1545376997).

22221021211 is a wasteful number, since it uses less digits than its factorization.

22221021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142962.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22221021211 its reverse (11212012222), we get a palindrome (33433033433).

The spelling of 22221021211 in words is "twenty-two billion, two hundred twenty-one million, twenty-one thousand, two hundred eleven".