13331304231421 has 4 divisors (see below), whose sum is σ = 14543240979744. Its totient is φ = 12119367483100.

The previous prime is 13331304231397. The next prime is 13331304231439. The reversal of 13331304231421 is 12413240313331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13331304231421 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 (13331304231481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 605968374145 + ... + 605968374166.

It is an arithmetic number, because the mean of its divisors is an integer number (3635810244936).

Almost surely, 2^{13331304231421} is an apocalyptic number.

13331304231421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13331304231421 is a deficient number, since it is larger than the sum of its proper divisors (1211936748323).

13331304231421 is a wasteful number, since it uses less digits than its factorization.

13331304231421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211936748322.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 13331304231421 its reverse (12413240313331), we get a palindrome (25744544544752).

The spelling of 13331304231421 in words is "thirteen trillion, three hundred thirty-one billion, three hundred four million, two hundred thirty-one thousand, four hundred twenty-one".