12182321 has 2 divisors, whose sum is σ = 12182322. Its totient is φ = 12182320.

The previous prime is 12182281. The next prime is 12182329. The reversal of 12182321 is 12328121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9991921 + 2190400 = 3161^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 12182321 - 2⁶ = 12182257 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12182293 and 12182302.

It is not a weakly prime, because it can be changed into another prime (12182329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6091160 + 6091161.

It is an arithmetic number, because the mean of its divisors is an integer number (6091161).

Almost surely, 2^12182321 is an apocalyptic number.

It is an amenable number.

12182321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12182321 is an equidigital number, since it uses as much as digits as its factorization.

12182321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 20.

The square root of 12182321 is about 3490.3181803383. The cubic root of 12182321 is about 230.0965001489.

The spelling of 12182321 in words is "twelve million, one hundred eighty-two thousand, three hundred twenty-one".