13443434342321 has 4 divisors (see below), whose sum is σ = 13476959116644. Its totient is φ = 13409909568000.

The previous prime is 13443434342297. The next prime is 13443434342339. The reversal of 13443434342321 is 12324343434431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13315492921600 + 127941420721 = 3649040^2 + 357689^2 .

It is a cyclic number.

It is not a de Polignac number, because 13443434342321 - 2⁴² = 9045387831217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13443434342341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16762386560 + ... + 16762387361.

It is an arithmetic number, because the mean of its divisors is an integer number (3369239779161).

Almost surely, 2^{13443434342321} is an apocalyptic number.

It is an amenable number.

13443434342321 is a deficient number, since it is larger than the sum of its proper divisors (33524774323).

13443434342321 is an equidigital number, since it uses as much as digits as its factorization.

13443434342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33524774322.

The product of its digits is 995328, while the sum is 41.

Adding to 13443434342321 its reverse (12324343434431), we get a palindrome (25767777776752).

The spelling of 13443434342321 in words is "thirteen trillion, four hundred forty-three billion, four hundred thirty-four million, three hundred forty-two thousand, three hundred twenty-one".