13131132321 has 4 divisors (see below), whose sum is σ = 17508176432. Its totient is φ = 8754088212.

The previous prime is 13131132319. The next prime is 13131132347. The reversal of 13131132321 is 12323113131.

It is a happy number.

13131132321 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13131132321 - 2¹ = 13131132319 is a prime.

It is a super-2 number, since 2×13131132321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13131134321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2188522051 + ... + 2188522056.

It is an arithmetic number, because the mean of its divisors is an integer number (4377044108).

Almost surely, 2^13131132321 is an apocalyptic number.

It is an amenable number.

13131132321 is a deficient number, since it is larger than the sum of its proper divisors (4377044111).

13131132321 is an equidigital number, since it uses as much as digits as its factorization.

13131132321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4377044110.

The product of its digits is 324, while the sum is 21.

Adding to 13131132321 its reverse (12323113131), we get a palindrome (25454245452).

The spelling of 13131132321 in words is "thirteen billion, one hundred thirty-one million, one hundred thirty-two thousand, three hundred twenty-one".