12144122231 has 4 divisors (see below), whose sum is σ = 12343206264. Its totient is φ = 11945038200.

The previous prime is 12144122201. The next prime is 12144122239. The reversal of 12144122231 is 13222144121.

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 12144122231 - 2⁶ = 12144122167 is a prime.

It is a super-2 number, since 2×12144122231² (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 = 12144122197 and 12144122206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12144122239) 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, 99541925 + ... + 99542046.

It is an arithmetic number, because the mean of its divisors is an integer number (3085801566).

Almost surely, 2^12144122231 is an apocalyptic number.

12144122231 is a deficient number, since it is larger than the sum of its proper divisors (199084033).

12144122231 is an equidigital number, since it uses as much as digits as its factorization.

12144122231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199084032.

The product of its digits is 768, while the sum is 23.

Adding to 12144122231 its reverse (13222144121), we get a palindrome (25366266352).

The spelling of 12144122231 in words is "twelve billion, one hundred forty-four million, one hundred twenty-two thousand, two hundred thirty-one".