12213112123 has 4 divisors (see below), whose sum is σ = 12237393168. Its totient is φ = 12188831080.

The previous prime is 12213112117. The next prime is 12213112151. The reversal of 12213112123 is 32121131221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12213112123 - 2⁵ = 12213112091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12213112123.

It is not an unprimeable number, because it can be changed into a prime (12213172123) 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, 12139768 + ... + 12140773.

It is an arithmetic number, because the mean of its divisors is an integer number (3059348292).

Almost surely, 2^12213112123 is an apocalyptic number.

12213112123 is a deficient number, since it is larger than the sum of its proper divisors (24281045).

12213112123 is an equidigital number, since it uses as much as digits as its factorization.

12213112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24281044.

The product of its digits is 144, while the sum is 19.

Adding to 12213112123 its reverse (32121131221), we get a palindrome (44334243344).

The spelling of 12213112123 in words is "twelve billion, two hundred thirteen million, one hundred twelve thousand, one hundred twenty-three".