4323113220721 has 2 divisors, whose sum is σ = 4323113220722. Its totient is φ = 4323113220720.

The previous prime is 4323113220689. The next prime is 4323113220731. The reversal of 4323113220721 is 1270223113234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3543282934321 + 779830286400 = 1882361^2 + 883080^2 .

It is a cyclic number.

It is not a de Polignac number, because 4323113220721 - 2⁵ = 4323113220689 is a prime.

It is not a weakly prime, because it can be changed into another prime (4323113220731) 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, 2161556610360 + 2161556610361.

It is an arithmetic number, because the mean of its divisors is an integer number (2161556610361).

Almost surely, 2^{4323113220721} is an apocalyptic number.

It is an amenable number.

4323113220721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4323113220721 is an equidigital number, since it uses as much as digits as its factorization.

4323113220721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 4323113220721 its reverse (1270223113234), we get a palindrome (5593336333955).

The spelling of 4323113220721 in words is "four trillion, three hundred twenty-three billion, one hundred thirteen million, two hundred twenty thousand, seven hundred twenty-one".