13231230321 has 16 divisors (see below), whose sum is σ = 17698760064. Its totient is φ = 8792308224.

The previous prime is 13231230293. The next prime is 13231230343. The reversal of 13231230321 is 12303213231.

It is not a de Polignac number, because 13231230321 - 2⁵ = 13231230289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13231230361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1236225 + ... + 1246881.

It is an arithmetic number, because the mean of its divisors is an integer number (1106172504).

Almost surely, 2^13231230321 is an apocalyptic number.

It is an amenable number.

13231230321 is a deficient number, since it is larger than the sum of its proper divisors (4467529743).

13231230321 is a wasteful number, since it uses less digits than its factorization.

13231230321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11960.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 13231230321 its reverse (12303213231), we get a palindrome (25534443552).

The spelling of 13231230321 in words is "thirteen billion, two hundred thirty-one million, two hundred thirty thousand, three hundred twenty-one".