1222618217 has 2 divisors, whose sum is σ = 1222618218. Its totient is φ = 1222618216.

The previous prime is 1222618169. The next prime is 1222618219. The reversal of 1222618217 is 7128162221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1135083481 + 87534736 = 33691^2 + 9356^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222618217 - 2²⁶ = 1155509353 is a prime.

It is a super-3 number, since 3×1222618217³ (a number of 28 digits) contains 333 as substring.

Together with 1222618219, 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 (1222618219) 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, 611309108 + 611309109.

It is an arithmetic number, because the mean of its divisors is an integer number (611309109).

Almost surely, 2^1222618217 is an apocalyptic number.

It is an amenable number.

1222618217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222618217 is an equidigital number, since it uses as much as digits as its factorization.

1222618217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 32.

The square root of 1222618217 is about 34965.9579734347. The cubic root of 1222618217 is about 1069.2935672434.

The spelling of 1222618217 in words is "one billion, two hundred twenty-two million, six hundred eighteen thousand, two hundred seventeen".