1222222289 has 2 divisors, whose sum is σ = 1222222290. Its totient is φ = 1222222288.

The previous prime is 1222222247. The next prime is 1222222303. The reversal of 1222222289 is 9822222221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1110222400 + 111999889 = 33320^2 + 10583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222222289 - 2⁸ = 1222222033 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1222222189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611111144 + 611111145.

It is an arithmetic number, because the mean of its divisors is an integer number (611111145).

Almost surely, 2^1222222289 is an apocalyptic number.

It is an amenable number.

1222222289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222222289 is an equidigital number, since it uses as much as digits as its factorization.

1222222289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 32.

The square root of 1222222289 is about 34960.2958940567. The cubic root of 1222222289 is about 1069.1781294706.

The spelling of 1222222289 in words is "one billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred eighty-nine".