3243430444021 has 2 divisors, whose sum is σ = 3243430444022. Its totient is φ = 3243430444020.

The previous prime is 3243430444019. The next prime is 3243430444049. The reversal of 3243430444021 is 1204440343423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2893788840996 + 349641603025 = 1701114^2 + 591305^2 .

It is a cyclic number.

It is not a de Polignac number, because 3243430444021 - 2¹ = 3243430444019 is a prime.

It is a super-2 number, since 2×3243430444021² (a number of 26 digits) contains 22 as substring.

Together with 3243430444019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3243430444061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1621715222010 + 1621715222011.

It is an arithmetic number, because the mean of its divisors is an integer number (1621715222011).

Almost surely, 2^{3243430444021} is an apocalyptic number.

It is an amenable number.

3243430444021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3243430444021 is an equidigital number, since it uses as much as digits as its factorization.

3243430444021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 3243430444021 its reverse (1204440343423), we get a palindrome (4447870787444).

The spelling of 3243430444021 in words is "three trillion, two hundred forty-three billion, four hundred thirty million, four hundred forty-four thousand, twenty-one".