12217211 has 2 divisors, whose sum is σ = 12217212. Its totient is φ = 12217210.

The previous prime is 12217199. The next prime is 12217241. The reversal of 12217211 is 11271221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12217211 - 2⁶ = 12217147 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12217211.

It is not a weakly prime, because it can be changed into another prime (12217241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108605 + 6108606.

It is an arithmetic number, because the mean of its divisors is an integer number (6108606).

Almost surely, 2^12217211 is an apocalyptic number.

12217211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12217211 is an equidigital number, since it uses as much as digits as its factorization.

12217211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56, while the sum is 17.

The square root of 12217211 is about 3495.3127184846. The cubic root of 12217211 is about 230.3159551819.

Adding to 12217211 its reverse (11271221), we get a palindrome (23488432).

The spelling of 12217211 in words is "twelve million, two hundred seventeen thousand, two hundred eleven".