13233211231 has 4 divisors (see below), whose sum is σ = 13233737152. Its totient is φ = 13232685312.

The previous prime is 13233211223. The next prime is 13233211261. The reversal of 13233211231 is 13211233231.

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 13233211231 - 2³ = 13233211223 is a prime.

It is a super-2 number, since 2×13233211231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13233211261) 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, 223215 + ... + 276208.

It is an arithmetic number, because the mean of its divisors is an integer number (3308434288).

Almost surely, 2^13233211231 is an apocalyptic number.

13233211231 is a deficient number, since it is larger than the sum of its proper divisors (525921).

13233211231 is an equidigital number, since it uses as much as digits as its factorization.

13233211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525920.

The product of its digits is 648, while the sum is 22.

Adding to 13233211231 its reverse (13211233231), we get a palindrome (26444444462).

The spelling of 13233211231 in words is "thirteen billion, two hundred thirty-three million, two hundred eleven thousand, two hundred thirty-one".