13334331421 has 4 divisors (see below), whose sum is σ = 13334569344. Its totient is φ = 13334093500.

The previous prime is 13334331407. The next prime is 13334331449. The reversal of 13334331421 is 12413343331.

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 not a de Polignac number, because 13334331421 - 2⁵ = 13334331389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13334331421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13334331401) 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, 16596 + ... + 164146.

It is an arithmetic number, because the mean of its divisors is an integer number (3333642336).

Almost surely, 2^13334331421 is an apocalyptic number.

It is an amenable number.

13334331421 is a deficient number, since it is larger than the sum of its proper divisors (237923).

13334331421 is an equidigital number, since it uses as much as digits as its factorization.

13334331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237922.

The product of its digits is 7776, while the sum is 28.

Adding to 13334331421 its reverse (12413343331), we get a palindrome (25747674752).

The spelling of 13334331421 in words is "thirteen billion, three hundred thirty-four million, three hundred thirty-one thousand, four hundred twenty-one".