12227681 has 2 divisors, whose sum is σ = 12227682. Its totient is φ = 12227680.

The previous prime is 12227627. The next prime is 12227711. The reversal of 12227681 is 18672221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7317025 + 4910656 = 2705^2 + 2216^2 .

It is an emirp because it is prime and its reverse (18672221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12227681 is a prime.

It is a super-2 number, since 2×12227681² = 299032365275522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12227081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6113840 + 6113841.

It is an arithmetic number, because the mean of its divisors is an integer number (6113841).

Almost surely, 2^12227681 is an apocalyptic number.

It is an amenable number.

12227681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12227681 is an equidigital number, since it uses as much as digits as its factorization.

12227681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 29.

The square root of 12227681 is about 3496.8101178074. The cubic root of 12227681 is about 230.3817290460.

The spelling of 12227681 in words is "twelve million, two hundred twenty-seven thousand, six hundred eighty-one".