12001332123 has 18 divisors (see below), whose sum is σ = 19054458332. Its totient is φ = 7273533960.

The previous prime is 12001332113. The next prime is 12001332143. The reversal of 12001332123 is 32123310021.

It is not a de Polignac number, because 12001332123 - 2¹⁰ = 12001331099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001332096 and 12001332105.

It is not an unprimeable number, because it can be changed into a prime (12001332113) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5509165 + ... + 5511342.

Almost surely, 2^12001332123 is an apocalyptic number.

12001332123 is a deficient number, since it is larger than the sum of its proper divisors (7053126209).

12001332123 is a wasteful number, since it uses less digits than its factorization.

12001332123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11020535 (or 11020521 counting only the distinct ones).

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

Adding to 12001332123 its reverse (32123310021), we get a palindrome (44124642144).

The spelling of 12001332123 in words is "twelve billion, one million, three hundred thirty-two thousand, one hundred twenty-three".