12102220217 has 2 divisors, whose sum is σ = 12102220218. Its totient is φ = 12102220216.

The previous prime is 12102220213. The next prime is 12102220237. The reversal of 12102220217 is 71202220121.

It is an a-pointer prime, because the next prime (12102220237) can be obtained adding 12102220217 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9031841296 + 3070378921 = 95036^2 + 55411^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102220217 - 2² = 12102220213 is a prime.

It is not a weakly prime, because it can be changed into another prime (12102220213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051110108 + 6051110109.

It is an arithmetic number, because the mean of its divisors is an integer number (6051110109).

Almost surely, 2^12102220217 is an apocalyptic number.

It is an amenable number.

12102220217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102220217 is an equidigital number, since it uses as much as digits as its factorization.

12102220217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 12102220217 its reverse (71202220121), we get a palindrome (83304440338).

The spelling of 12102220217 in words is "twelve billion, one hundred two million, two hundred twenty thousand, two hundred seventeen".