12012321 has 8 divisors (see below), whose sum is σ = 16066144. Its totient is φ = 7983360.

The previous prime is 12012289. The next prime is 12012331. The reversal of 12012321 is 12321021.

12012321 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12012321 - 2⁵ = 12012289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012297 and 12012306.

It is not an unprimeable number, because it can be changed into a prime (12012331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5056 + ... + 7041.

It is an arithmetic number, because the mean of its divisors is an integer number (2008268).

Almost surely, 2^12012321 is an apocalyptic number.

It is an amenable number.

12012321 is a deficient number, since it is larger than the sum of its proper divisors (4053823).

12012321 is a wasteful number, since it uses less digits than its factorization.

12012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12431.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12012321 is about 3465.8795420499. The cubic root of 12012321 is about 229.0211773986.

Adding to 12012321 its reverse (12321021), we get a palindrome (24333342).

The spelling of 12012321 in words is "twelve million, twelve thousand, three hundred twenty-one".