12212307917 has 2 divisors, whose sum is σ = 12212307918. Its totient is φ = 12212307916.

The previous prime is 12212307911. The next prime is 12212307971. The reversal of 12212307917 is 71970321221.

It is a happy number.

Together with next prime (12212307971) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8083088836 + 4129219081 = 89906^2 + 64259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212307917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212307911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106153958 + 6106153959.

It is an arithmetic number, because the mean of its divisors is an integer number (6106153959).

Almost surely, 2^12212307917 is an apocalyptic number.

It is an amenable number.

12212307917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212307917 is an equidigital number, since it uses as much as digits as its factorization.

12212307917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

The spelling of 12212307917 in words is "twelve billion, two hundred twelve million, three hundred seven thousand, nine hundred seventeen".