11603321 has 2 divisors, whose sum is σ = 11603322. Its totient is φ = 11603320.

The previous prime is 11603309. The next prime is 11603323. The reversal of 11603321 is 12330611.

11603321 is digitally balanced in base 2, 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., 10530025 + 1073296 = 3245^2 + 1036^2 .

It is an emirp because it is prime and its reverse (12330611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11603321 - 2⁶ = 11603257 is a prime.

It is a Sophie Germain prime.

Together with 11603323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11603321.

It is not a weakly prime, because it can be changed into another prime (11603323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5801660 + 5801661.

It is an arithmetic number, because the mean of its divisors is an integer number (5801661).

Almost surely, 2^11603321 is an apocalyptic number.

It is an amenable number.

11603321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11603321 is an equidigital number, since it uses as much as digits as its factorization.

11603321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 11603321 is about 3406.3647778827. The cubic root of 11603321 is about 226.3918398774.

Adding to 11603321 its reverse (12330611), we get a palindrome (23933932).

The spelling of 11603321 in words is "eleven million, six hundred three thousand, three hundred twenty-one".