22202021209 has 2 divisors, whose sum is σ = 22202021210. Its totient is φ = 22202021208.

The previous prime is 22202021207. The next prime is 22202021243. The reversal of 22202021209 is 90212020222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16402437184 + 5799584025 = 128072^2 + 76155^2 .

It is a cyclic number.

It is not a de Polignac number, because 22202021209 - 2¹ = 22202021207 is a prime.

Together with 22202021207, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22202021209.

It is not a weakly prime, because it can be changed into another prime (22202021207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11101010604 + 11101010605.

It is an arithmetic number, because the mean of its divisors is an integer number (11101010605).

Almost surely, 2^22202021209 is an apocalyptic number.

It is an amenable number.

22202021209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22202021209 is an equidigital number, since it uses as much as digits as its factorization.

22202021209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 22202021209 in words is "twenty-two billion, two hundred two million, twenty-one thousand, two hundred nine".