222122909 has 2 divisors, whose sum is σ = 222122910. Its totient is φ = 222122908.

The previous prime is 222122903. The next prime is 222122911. The reversal of 222122909 is 909221222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221116900 + 1006009 = 14870^2 + 1003^2 .

It is a cyclic number.

It is not a de Polignac number, because 222122909 - 2⁸ = 222122653 is a prime.

Together with 222122911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222122903) 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, 111061454 + 111061455.

It is an arithmetic number, because the mean of its divisors is an integer number (111061455).

Almost surely, 2^222122909 is an apocalyptic number.

It is an amenable number.

222122909 is a deficient number, since it is larger than the sum of its proper divisors (1).

222122909 is an equidigital number, since it uses as much as digits as its factorization.

222122909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 222122909 is about 14903.7884110048. The cubic root of 222122909 is about 605.6166187816.

The spelling of 222122909 in words is "two hundred twenty-two million, one hundred twenty-two thousand, nine hundred nine".