12012321003 has 16 divisors (see below), whose sum is σ = 16107442176. Its totient is φ = 7962744960.

The previous prime is 12012321001. The next prime is 12012321019. The reversal of 12012321003 is 30012321021.

It is not a de Polignac number, because 12012321003 - 2¹ = 12012321001 is a prime.

It is a super-2 number, since 2×12012321003² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12012321001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2170626 + ... + 2176152.

It is an arithmetic number, because the mean of its divisors is an integer number (1006715136).

Almost surely, 2^12012321003 is an apocalyptic number.

12012321003 is a deficient number, since it is larger than the sum of its proper divisors (4095121173).

12012321003 is a wasteful number, since it uses less digits than its factorization.

12012321003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9514.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12012321003 its reverse (30012321021), we get a palindrome (42024642024).

The spelling of 12012321003 in words is "twelve billion, twelve million, three hundred twenty-one thousand, three".