13331332144421 has 4 divisors (see below), whose sum is σ = 13331362159500. Its totient is φ = 13331302129344.

The previous prime is 13331332144387. The next prime is 13331332144451. The reversal of 13331332144421 is 12444123313331.

13331332144421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10751277019396 + 2580055125025 = 3278914^2 + 1606255^2 .

It is a cyclic number.

It is not a de Polignac number, because 13331332144421 - 2¹⁸ = 13331331882277 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 (13331332144451) 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, 14331146 + ... + 15233003.

It is an arithmetic number, because the mean of its divisors is an integer number (3332840539875).

Almost surely, 2^{13331332144421} is an apocalyptic number.

It is an amenable number.

13331332144421 is a deficient number, since it is larger than the sum of its proper divisors (30015079).

13331332144421 is an equidigital number, since it uses as much as digits as its factorization.

13331332144421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30015078.

The product of its digits is 62208, while the sum is 35.

Adding to 13331332144421 its reverse (12444123313331), we get a palindrome (25775455457752).

The spelling of 13331332144421 in words is "thirteen trillion, three hundred thirty-one billion, three hundred thirty-two million, one hundred forty-four thousand, four hundred twenty-one".