12021222217 has 2 divisors, whose sum is σ = 12021222218. Its totient is φ = 12021222216.

The previous prime is 12021222163. The next prime is 12021222247. The reversal of 12021222217 is 71222212021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11998792521 + 22429696 = 109539^2 + 4736^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021222217 - 2²⁷ = 11887004489 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021222247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010611108 + 6010611109.

It is an arithmetic number, because the mean of its divisors is an integer number (6010611109).

Almost surely, 2^12021222217 is an apocalyptic number.

It is an amenable number.

12021222217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021222217 is an equidigital number, since it uses as much as digits as its factorization.

12021222217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 12021222217 its reverse (71222212021), we get a palindrome (83243434238).

The spelling of 12021222217 in words is "twelve billion, twenty-one million, two hundred twenty-two thousand, two hundred seventeen".