12003111321 has 4 divisors (see below), whose sum is σ = 16004148432. Its totient is φ = 8002074212.

The previous prime is 12003111311. The next prime is 12003111413. The reversal of 12003111321 is 12311130021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12311130021 = 3 ⋅4103710007.

It is a cyclic number.

It is not a de Polignac number, because 12003111321 - 2¹¹ = 12003109273 is a prime.

It is a super-3 number, since 3×12003111321³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12003111321.

It is not an unprimeable number, because it can be changed into a prime (12003111301) 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, 2000518551 + ... + 2000518556.

It is an arithmetic number, because the mean of its divisors is an integer number (4001037108).

Almost surely, 2^12003111321 is an apocalyptic number.

It is an amenable number.

12003111321 is a deficient number, since it is larger than the sum of its proper divisors (4001037111).

12003111321 is an equidigital number, since it uses as much as digits as its factorization.

12003111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001037110.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 12003111321 its reverse (12311130021), we get a palindrome (24314241342).

The spelling of 12003111321 in words is "twelve billion, three million, one hundred eleven thousand, three hundred twenty-one".