13321035421 has 4 divisors (see below), whose sum is σ = 13780381500. Its totient is φ = 12861689344.

The previous prime is 13321035391. The next prime is 13321035433. The reversal of 13321035421 is 12453012331.

It is a happy number.

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 7618671225 + 5702364196 = 87285^2 + 75514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13321035421 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 (13321005421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229672996 + ... + 229673053.

It is an arithmetic number, because the mean of its divisors is an integer number (3445095375).

Almost surely, 2^13321035421 is an apocalyptic number.

It is an amenable number.

13321035421 is a deficient number, since it is larger than the sum of its proper divisors (459346079).

13321035421 is an equidigital number, since it uses as much as digits as its factorization.

13321035421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459346078.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 13321035421 its reverse (12453012331), we get a palindrome (25774047752).

The spelling of 13321035421 in words is "thirteen billion, three hundred twenty-one million, thirty-five thousand, four hundred twenty-one".