12003211123 has 4 divisors (see below), whose sum is σ = 12003776568. Its totient is φ = 12002645680.

The previous prime is 12003211111. The next prime is 12003211139. The reversal of 12003211123 is 32111230021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32111230021 = 13 ⋅2470094617.

It is a cyclic number.

It is not a de Polignac number, because 12003211123 - 2²⁹ = 11466340211 is a prime.

It is a super-2 number, since 2×12003211123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12003211097 and 12003211106.

It is not an unprimeable number, because it can be changed into a prime (12003211723) 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, 249586 + ... + 293767.

It is an arithmetic number, because the mean of its divisors is an integer number (3000944142).

Almost surely, 2^12003211123 is an apocalyptic number.

12003211123 is a deficient number, since it is larger than the sum of its proper divisors (565445).

12003211123 is an equidigital number, since it uses as much as digits as its factorization.

12003211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565444.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12003211123 its reverse (32111230021), we get a palindrome (44114441144).

The spelling of 12003211123 in words is "twelve billion, three million, two hundred eleven thousand, one hundred twenty-three".