4243244201321 has 2 divisors, whose sum is σ = 4243244201322. Its totient is φ = 4243244201320.

The previous prime is 4243244201257. The next prime is 4243244201333. The reversal of 4243244201321 is 1231024423424.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3383627807296 + 859616394025 = 1839464^2 + 927155^2 .

It is a cyclic number.

It is not a de Polignac number, because 4243244201321 - 2⁶ = 4243244201257 is a prime.

It is not a weakly prime, because it can be changed into another prime (4243244201351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121622100660 + 2121622100661.

It is an arithmetic number, because the mean of its divisors is an integer number (2121622100661).

Almost surely, 2^{4243244201321} is an apocalyptic number.

It is an amenable number.

4243244201321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243244201321 is an equidigital number, since it uses as much as digits as its factorization.

4243244201321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 4243244201321 its reverse (1231024423424), we get a palindrome (5474268624745).

The spelling of 4243244201321 in words is "four trillion, two hundred forty-three billion, two hundred forty-four million, two hundred one thousand, three hundred twenty-one".