12133243231 has 4 divisors (see below), whose sum is σ = 12771835000. Its totient is φ = 11494651464.

The previous prime is 12133243223. The next prime is 12133243249. The reversal of 12133243231 is 13234233121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13234233121 = 97 ⋅136435393.

It is not a de Polignac number, because 12133243231 - 2³ = 12133243223 is a prime.

It is a super-2 number, since 2×12133243231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12133243196 and 12133243205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133241231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319295856 + ... + 319295893.

It is an arithmetic number, because the mean of its divisors is an integer number (3192958750).

Almost surely, 2^12133243231 is an apocalyptic number.

12133243231 is a deficient number, since it is larger than the sum of its proper divisors (638591769).

12133243231 is an equidigital number, since it uses as much as digits as its factorization.

12133243231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638591768.

The product of its digits is 2592, while the sum is 25.

Adding to 12133243231 its reverse (13234233121), we get a palindrome (25367476352).

The spelling of 12133243231 in words is "twelve billion, one hundred thirty-three million, two hundred forty-three thousand, two hundred thirty-one".