4343324421521 has 2 divisors, whose sum is σ = 4343324421522. Its totient is φ = 4343324421520.

The previous prime is 4343324421487. The next prime is 4343324421523. The reversal of 4343324421521 is 1251244233434.

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., 3231944613121 + 1111379808400 = 1797761^2 + 1054220^2 .

It is a cyclic number.

It is not a de Polignac number, because 4343324421521 - 2¹⁰ = 4343324420497 is a prime.

Together with 4343324421523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4343324421523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2171662210760 + 2171662210761.

It is an arithmetic number, because the mean of its divisors is an integer number (2171662210761).

Almost surely, 2^{4343324421521} is an apocalyptic number.

It is an amenable number.

4343324421521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4343324421521 is an equidigital number, since it uses as much as digits as its factorization.

4343324421521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 38.

Adding to 4343324421521 its reverse (1251244233434), we get a palindrome (5594568654955).

The spelling of 4343324421521 in words is "four trillion, three hundred forty-three billion, three hundred twenty-four million, four hundred twenty-one thousand, five hundred twenty-one".