12222257 has 2 divisors, whose sum is σ = 12222258. Its totient is φ = 12222256.

The previous prime is 12222241. The next prime is 12222271. The reversal of 12222257 is 75222221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10784656 + 1437601 = 3284^2 + 1199^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222257 - 2⁴ = 12222241 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is a zygodrome in base 15.

It is not a weakly prime, because it can be changed into another prime (12222557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111128 + 6111129.

It is an arithmetic number, because the mean of its divisors is an integer number (6111129).

Almost surely, 2^12222257 is an apocalyptic number.

It is an amenable number.

12222257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222257 is an equidigital number, since it uses as much as digits as its factorization.

12222257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 23.

The square root of 12222257 is about 3496.0344677935. The cubic root of 12222257 is about 230.3476594812.

Adding to 12222257 its reverse (75222221), we get a palindrome (87444478).

The spelling of 12222257 in words is "twelve million, two hundred twenty-two thousand, two hundred fifty-seven".