12143213 has 4 divisors (see below), whose sum is σ = 12167580. Its totient is φ = 12118848.

The previous prime is 12143189. The next prime is 12143221. The reversal of 12143213 is 31234121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31234121 = 619 ⋅50459.

It can be written as a sum of positive squares in 2 ways, for example, as 4761124 + 7382089 = 2182^2 + 2717^2 .

It is a cyclic number.

It is not a de Polignac number, because 12143213 - 2²⁰ = 11094637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12143191 and 12143200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11420 + ... + 12437.

It is an arithmetic number, because the mean of its divisors is an integer number (3041895).

Almost surely, 2^12143213 is an apocalyptic number.

It is an amenable number.

12143213 is a deficient number, since it is larger than the sum of its proper divisors (24367).

12143213 is an equidigital number, since it uses as much as digits as its factorization.

12143213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24366.

The product of its digits is 144, while the sum is 17.

The square root of 12143213 is about 3484.7113223336. The cubic root of 12143213 is about 229.8500156371.

Adding to 12143213 its reverse (31234121), we get a palindrome (43377334).

It can be divided in two parts, 121 and 43213, that added together give a palindrome (43334).

The spelling of 12143213 in words is "twelve million, one hundred forty-three thousand, two hundred thirteen".