11309321 has 2 divisors, whose sum is σ = 11309322. Its totient is φ = 11309320.

The previous prime is 11309303. The next prime is 11309329. The reversal of 11309321 is 12390311.

11309321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10725625 + 583696 = 3275^2 + 764^2 .

It is an emirp because it is prime and its reverse (12390311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11309321 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11309293 and 11309302.

It is not a weakly prime, because it can be changed into another prime (11309329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5654660 + 5654661.

It is an arithmetic number, because the mean of its divisors is an integer number (5654661).

Almost surely, 2^11309321 is an apocalyptic number.

It is an amenable number.

11309321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11309321 is an equidigital number, since it uses as much as digits as its factorization.

11309321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 11309321 is about 3362.9333921444. The cubic root of 11309321 is about 224.4633862410.

Adding to 11309321 its reverse (12390311), we get a palindrome (23699632).

The spelling of 11309321 in words is "eleven million, three hundred nine thousand, three hundred twenty-one".