12144214321 has 4 divisors (see below), whose sum is σ = 12144944500. Its totient is φ = 12143484144.

The previous prime is 12144214297. The next prime is 12144214331. The reversal of 12144214321 is 12341244121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12341244121 = 4987 ⋅2474683.

It can be written as a sum of positive squares in 2 ways, for example, as 11143124721 + 1001089600 = 105561^2 + 31640^2 .

It is a cyclic number.

It is not a de Polignac number, because 12144214321 - 2⁵ = 12144214289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12144214331) 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, 339546 + ... + 373603.

It is an arithmetic number, because the mean of its divisors is an integer number (3036236125).

Almost surely, 2^12144214321 is an apocalyptic number.

It is an amenable number.

12144214321 is a deficient number, since it is larger than the sum of its proper divisors (730179).

12144214321 is an equidigital number, since it uses as much as digits as its factorization.

12144214321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730178.

The product of its digits is 1536, while the sum is 25.

Adding to 12144214321 its reverse (12341244121), we get a palindrome (24485458442).

The spelling of 12144214321 in words is "twelve billion, one hundred forty-four million, two hundred fourteen thousand, three hundred twenty-one".