13231223111 has 4 divisors (see below), whose sum is σ = 13251673872. Its totient is φ = 13210772352.

The previous prime is 13231223099. The next prime is 13231223149. The reversal of 13231223111 is 11132213231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11132213231 = 431 ⋅25828801.

It is a cyclic number.

It is not a de Polignac number, because 13231223111 - 2¹⁴ = 13231206727 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 (13231223171) 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, 10224410 + ... + 10225703.

It is an arithmetic number, because the mean of its divisors is an integer number (3312918468).

Almost surely, 2^13231223111 is an apocalyptic number.

13231223111 is a deficient number, since it is larger than the sum of its proper divisors (20450761).

13231223111 is an equidigital number, since it uses as much as digits as its factorization.

13231223111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20450760.

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

Adding to 13231223111 its reverse (11132213231), we get a palindrome (24363436342).

The spelling of 13231223111 in words is "thirteen billion, two hundred thirty-one million, two hundred twenty-three thousand, one hundred eleven".