12002112123 has 4 divisors (see below), whose sum is σ = 16002816168. Its totient is φ = 8001408080.

The previous prime is 12002112107. The next prime is 12002112137. The reversal of 12002112123 is 32121120021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32121120021 = 3 ⋅10707040007.

It is a cyclic number.

It is not a de Polignac number, because 12002112123 - 2⁴ = 12002112107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12002112193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000352018 + ... + 2000352023.

It is an arithmetic number, because the mean of its divisors is an integer number (4000704042).

Almost surely, 2^12002112123 is an apocalyptic number.

12002112123 is a deficient number, since it is larger than the sum of its proper divisors (4000704045).

12002112123 is an equidigital number, since it uses as much as digits as its factorization.

12002112123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000704044.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12002112123 its reverse (32121120021), we get a palindrome (44123232144).

The spelling of 12002112123 in words is "twelve billion, two million, one hundred twelve thousand, one hundred twenty-three".