12113318213 has 4 divisors (see below), whose sum is σ = 12140297100. Its totient is φ = 12086339328.

The previous prime is 12113318177. The next prime is 12113318221. The reversal of 12113318213 is 31281331121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31281331121 = 563 ⋅55561867.

It can be written as a sum of positive squares in 2 ways, for example, as 6705480769 + 5407837444 = 81887^2 + 73538^2 .

It is a cyclic number.

It is not a de Polignac number, because 12113318213 - 2¹⁰ = 12113317189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12113318233) 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, 13488770 + ... + 13489667.

It is an arithmetic number, because the mean of its divisors is an integer number (3035074275).

Almost surely, 2^12113318213 is an apocalyptic number.

It is an amenable number.

12113318213 is a deficient number, since it is larger than the sum of its proper divisors (26978887).

12113318213 is an equidigital number, since it uses as much as digits as its factorization.

12113318213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26978886.

The product of its digits is 864, while the sum is 26.

Adding to 12113318213 its reverse (31281331121), we get a palindrome (43394649334).

The spelling of 12113318213 in words is "twelve billion, one hundred thirteen million, three hundred eighteen thousand, two hundred thirteen".