12002123123 has 4 divisors (see below), whose sum is σ = 12004238520. Its totient is φ = 12000007728.

The previous prime is 12002123117. The next prime is 12002123141. The reversal of 12002123123 is 32132120021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32132120021 = 1093 ⋅29398097.

It is a cyclic number.

It is not a de Polignac number, because 12002123123 - 2⁶ = 12002123059 is a prime.

It is a super-4 number, since 4×12002123123⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12002123183) 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, 1049165 + ... + 1060542.

It is an arithmetic number, because the mean of its divisors is an integer number (3001059630).

Almost surely, 2^12002123123 is an apocalyptic number.

12002123123 is a deficient number, since it is larger than the sum of its proper divisors (2115397).

12002123123 is an equidigital number, since it uses as much as digits as its factorization.

12002123123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115396.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12002123123 its reverse (32132120021), we get a palindrome (44134243144).

The spelling of 12002123123 in words is "twelve billion, two million, one hundred twenty-three thousand, one hundred twenty-three".