22031331209 has 2 divisors, whose sum is σ = 22031331210. Its totient is φ = 22031331208.

The previous prime is 22031331139. The next prime is 22031331211. The reversal of 22031331209 is 90213313022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18215551225 + 3815779984 = 134965^2 + 61772^2 .

It is a cyclic number.

It is not a de Polignac number, because 22031331209 - 2¹² = 22031327113 is a prime.

Together with 22031331211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22031331299) 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 as a sum of consecutive naturals, namely, 11015665604 + 11015665605.

It is an arithmetic number, because the mean of its divisors is an integer number (11015665605).

Almost surely, 2^22031331209 is an apocalyptic number.

It is an amenable number.

22031331209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22031331209 is an equidigital number, since it uses as much as digits as its factorization.

22031331209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 22031331209 in words is "twenty-two billion, thirty-one million, three hundred thirty-one thousand, two hundred nine".