12001233123 has 48 divisors (see below), whose sum is σ = 19408177152. Its totient is φ = 7082928000.

The previous prime is 12001233109. The next prime is 12001233151. The reversal of 12001233123 is 32133210021.

It is not a de Polignac number, because 12001233123 - 2⁹ = 12001232611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001233096 and 12001233105.

It is not an unprimeable number, because it can be changed into a prime (12001233323) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2461378 + ... + 2466248.

It is an arithmetic number, because the mean of its divisors is an integer number (404337024).

Almost surely, 2^12001233123 is an apocalyptic number.

12001233123 is a deficient number, since it is larger than the sum of its proper divisors (7406944029).

12001233123 is a wasteful number, since it uses less digits than its factorization.

12001233123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536 (or 5533 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12001233123 its reverse (32133210021), we get a palindrome (44134443144).

The spelling of 12001233123 in words is "twelve billion, one million, two hundred thirty-three thousand, one hundred twenty-three".