12023213 has 4 divisors (see below), whose sum is σ = 12049980. Its totient is φ = 11996448.

The previous prime is 12023191. The next prime is 12023239. The reversal of 12023213 is 31232021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31232021 = 5519 ⋅5659.

It can be written as a sum of positive squares in 2 ways, for example, as 5484964 + 6538249 = 2342^2 + 2557^2 .

It is a cyclic number.

It is not a de Polignac number, because 12023213 - 2¹⁴ = 12006829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023243) 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, 12698 + ... + 13611.

It is an arithmetic number, because the mean of its divisors is an integer number (3012495).

Almost surely, 2^12023213 is an apocalyptic number.

It is an amenable number.

12023213 is a deficient number, since it is larger than the sum of its proper divisors (26767).

12023213 is an equidigital number, since it uses as much as digits as its factorization.

12023213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26766.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 12023213 is about 3467.4505043331. The cubic root of 12023213 is about 229.0903770449.

Adding to 12023213 its reverse (31232021), we get a palindrome (43255234).

The spelling of 12023213 in words is "twelve million, twenty-three thousand, two hundred thirteen".