22012021309 has 2 divisors, whose sum is σ = 22012021310. Its totient is φ = 22012021308.

The previous prime is 22012021279. The next prime is 22012021327. The reversal of 22012021309 is 90312021022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21014851225 + 997170084 = 144965^2 + 31578^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012021309 - 2¹⁷ = 22011890237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22012021309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22012021399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006010654 + 11006010655.

It is an arithmetic number, because the mean of its divisors is an integer number (11006010655).

Almost surely, 2^22012021309 is an apocalyptic number.

It is an amenable number.

22012021309 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012021309 is an equidigital number, since it uses as much as digits as its factorization.

22012021309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 22012021309 in words is "twenty-two billion, twelve million, twenty-one thousand, three hundred nine".