12112213 has 4 divisors (see below), whose sum is σ = 12127788. Its totient is φ = 12096640.

The previous prime is 12112187. The next prime is 12112231. The reversal of 12112213 is 31221121.

12112213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31221121 = 3533 ⋅8837.

It can be written as a sum of positive squares in 2 ways, for example, as 4588164 + 7524049 = 2142^2 + 2743^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112213 - 2⁵ = 12112181 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12112193 and 12112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112013) 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, 6556 + ... + 8197.

It is an arithmetic number, because the mean of its divisors is an integer number (3031947).

Almost surely, 2^12112213 is an apocalyptic number.

It is an amenable number.

12112213 is a deficient number, since it is larger than the sum of its proper divisors (15575).

12112213 is an equidigital number, since it uses as much as digits as its factorization.

12112213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15574.

The product of its digits is 24, while the sum is 13.

The square root of 12112213 is about 3480.2604787573. The cubic root of 12112213 is about 229.6542568360.

Adding to 12112213 its reverse (31221121), we get a palindrome (43333334).

It can be divided in two parts, 12112 and 213, that multiplied together give a triangular number (2579856 = T₂₂₇₁).

The spelling of 12112213 in words is "twelve million, one hundred twelve thousand, two hundred thirteen".