13231112321 has 16 divisors (see below), whose sum is σ = 15194982528. Its totient is φ = 11285740800.

The previous prime is 13231112317. The next prime is 13231112351. The reversal of 13231112321 is 12321113231.

It is a happy number.

It is not a de Polignac number, because 13231112321 - 2² = 13231112317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13231112293 and 13231112302.

It is not an unprimeable number, because it can be changed into a prime (13231112311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4065731 + ... + 4068983.

It is an arithmetic number, because the mean of its divisors is an integer number (949686408).

Almost surely, 2^13231112321 is an apocalyptic number.

It is an amenable number.

13231112321 is a deficient number, since it is larger than the sum of its proper divisors (1963870207).

13231112321 is a wasteful number, since it uses less digits than its factorization.

13231112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5912.

The product of its digits is 216, while the sum is 20.

Adding to 13231112321 its reverse (12321113231), we get a palindrome (25552225552).

The spelling of 13231112321 in words is "thirteen billion, two hundred thirty-one million, one hundred twelve thousand, three hundred twenty-one".