12211211689 has 2 divisors, whose sum is σ = 12211211690. Its totient is φ = 12211211688.

The previous prime is 12211211653. The next prime is 12211211693. The reversal of 12211211689 is 98611211221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12135225600 + 75986089 = 110160^2 + 8717^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211211689 - 2²⁷ = 12076993961 is a prime.

It is a super-2 number, since 2×12211211689² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12211211609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105605844 + 6105605845.

It is an arithmetic number, because the mean of its divisors is an integer number (6105605845).

Almost surely, 2^12211211689 is an apocalyptic number.

It is an amenable number.

12211211689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211211689 is an equidigital number, since it uses as much as digits as its factorization.

12211211689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 34.

The spelling of 12211211689 in words is "twelve billion, two hundred eleven million, two hundred eleven thousand, six hundred eighty-nine".