12112222123 has 4 divisors (see below), whose sum is σ = 12278143048. Its totient is φ = 11946301200.

The previous prime is 12112222097. The next prime is 12112222153. The reversal of 12112222123 is 32122221121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32122221121 = 2341 ⋅13721581.

It is a cyclic number.

It is not a de Polignac number, because 12112222123 - 2²⁹ = 11575351211 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 12112222123.

It is not an unprimeable number, because it can be changed into a prime (12112222153) 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, 82960353 + ... + 82960498.

It is an arithmetic number, because the mean of its divisors is an integer number (3069535762).

Almost surely, 2^12112222123 is an apocalyptic number.

12112222123 is a deficient number, since it is larger than the sum of its proper divisors (165920925).

12112222123 is an equidigital number, since it uses as much as digits as its factorization.

12112222123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165920924.

The product of its digits is 192, while the sum is 19.

Adding to 12112222123 its reverse (32122221121), we get a palindrome (44234443244).

The spelling of 12112222123 in words is "twelve billion, one hundred twelve million, two hundred twenty-two thousand, one hundred twenty-three".