13333443364421 has 4 divisors (see below), whose sum is σ = 13552024403244. Its totient is φ = 13114862325600.

The previous prime is 13333443364379. The next prime is 13333443364427. The reversal of 13333443364421 is 12446334433331.

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 4049472028900 + 9283971335521 = 2012330^2 + 3046961^2 .

It is a cyclic number.

It is not a de Polignac number, because 13333443364421 - 2³⁰ = 13332369622597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13333443364427) 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, 109290519320 + ... + 109290519441.

It is an arithmetic number, because the mean of its divisors is an integer number (3388006100811).

Almost surely, 2^{13333443364421} is an apocalyptic number.

It is an amenable number.

13333443364421 is a deficient number, since it is larger than the sum of its proper divisors (218581038823).

13333443364421 is an equidigital number, since it uses as much as digits as its factorization.

13333443364421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218581038822.

The product of its digits is 2239488, while the sum is 44.

Adding to 13333443364421 its reverse (12446334433331), we get a palindrome (25779777797752).

The spelling of 13333443364421 in words is "thirteen trillion, three hundred thirty-three billion, four hundred forty-three million, three hundred sixty-four thousand, four hundred twenty-one".