12210321 has 8 divisors (see below), whose sum is σ = 16323840. Its totient is φ = 8118512.

The previous prime is 12210307. The next prime is 12210343. The reversal of 12210321 is 12301221.

12210321 is digitally balanced in base 3, because in such base 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 a cyclic number.

It is not a de Polignac number, because 12210321 - 2⁹ = 12209809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210297 and 12210306.

It is not an unprimeable number, because it can be changed into a prime (12210221) 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, 4065 + ... + 6398.

It is an arithmetic number, because the mean of its divisors is an integer number (2040480).

Almost surely, 2^12210321 is an apocalyptic number.

It is an amenable number.

12210321 is a deficient number, since it is larger than the sum of its proper divisors (4113519).

12210321 is a wasteful number, since it uses less digits than its factorization.

12210321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10855.

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

The square root of 12210321 is about 3494.3269738249. The cubic root of 12210321 is about 230.2726508266.

Adding to 12210321 its reverse (12301221), we get a palindrome (24511542).

The spelling of 12210321 in words is "twelve million, two hundred ten thousand, three hundred twenty-one".