12103221 has 32 divisors (see below), whose sum is σ = 18450432. Its totient is φ = 7001280.

The previous prime is 12103213. The next prime is 12103243. The reversal of 12103221 is 12230121.

It is not a de Polignac number, because 12103221 - 2³ = 12103213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12103197 and 12103206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92326 + ... + 92456.

It is an arithmetic number, because the mean of its divisors is an integer number (576576).

Almost surely, 2^12103221 is an apocalyptic number.

It is an amenable number.

12103221 is a deficient number, since it is larger than the sum of its proper divisors (6347211).

12103221 is a wasteful number, since it uses less digits than its factorization.

12103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273.

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

The square root of 12103221 is about 3478.9683815752. The cubic root of 12103221 is about 229.5974116690.

Adding to 12103221 its reverse (12230121), we get a palindrome (24333342).

The spelling of 12103221 in words is "twelve million, one hundred three thousand, two hundred twenty-one".