12002000123 has 4 divisors (see below), whose sum is σ = 12633684360. Its totient is φ = 11370315888.

The previous prime is 12002000111. The next prime is 12002000167. The reversal of 12002000123 is 32100020021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32100020021 = 5011 ⋅6405911.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12002000123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12002000173) 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, 315842090 + ... + 315842127.

It is an arithmetic number, because the mean of its divisors is an integer number (3158421090).

Almost surely, 2^12002000123 is an apocalyptic number.

12002000123 is a deficient number, since it is larger than the sum of its proper divisors (631684237).

12002000123 is an equidigital number, since it uses as much as digits as its factorization.

12002000123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631684236.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 12002000123 its reverse (32100020021), we get a palindrome (44102020144).

The spelling of 12002000123 in words is "twelve billion, two million, one hundred twenty-three", and thus it is an aban number.