33001321 has 2 divisors, whose sum is σ = 33001322. Its totient is φ = 33001320.

The previous prime is 33001313. The next prime is 33001337. The reversal of 33001321 is 12310033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30858025 + 2143296 = 5555^2 + 1464^2 .

It is an emirp because it is prime and its reverse (12310033) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33001321 - 2³ = 33001313 is a prime.

It is a super-4 number, since 4×33001321⁴ (a number of 31 digits) contains 4444 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33001361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16500660 + 16500661.

It is an arithmetic number, because the mean of its divisors is an integer number (16500661).

Almost surely, 2^33001321 is an apocalyptic number.

It is an amenable number.

33001321 is a deficient number, since it is larger than the sum of its proper divisors (1).

33001321 is an equidigital number, since it uses as much as digits as its factorization.

33001321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 33001321 is about 5744.6776236792. The cubic root of 33001321 is about 320.7577128948.

Adding to 33001321 its reverse (12310033), we get a palindrome (45311354).

The spelling of 33001321 in words is "thirty-three million, one thousand, three hundred twenty-one".