13231221323 has 4 divisors (see below), whose sum is σ = 13243067760. Its totient is φ = 13219374888.

The previous prime is 13231221301. The next prime is 13231221373. The reversal of 13231221323 is 32312213231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13231221323 - 2²² = 13227027019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13231221373) 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, 5921543 + ... + 5923776.

It is an arithmetic number, because the mean of its divisors is an integer number (3310766940).

Almost surely, 2^13231221323 is an apocalyptic number.

13231221323 is a deficient number, since it is larger than the sum of its proper divisors (11846437).

13231221323 is a wasteful number, since it uses less digits than its factorization.

13231221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11846436.

The product of its digits is 1296, while the sum is 23.

Adding to 13231221323 its reverse (32312213231), we get a palindrome (45543434554).

The spelling of 13231221323 in words is "thirteen billion, two hundred thirty-one million, two hundred twenty-one thousand, three hundred twenty-three".