12321205 has 16 divisors (see below), whose sum is σ = 16055424. Its totient is φ = 9023040.

The previous prime is 12321193. The next prime is 12321223. The reversal of 12321205 is 50212321.

It is not a de Polignac number, because 12321205 - 2¹⁷ = 12190133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7792 + ... + 9238.

It is an arithmetic number, because the mean of its divisors is an integer number (1003464).

Almost surely, 2^12321205 is an apocalyptic number.

It is an amenable number.

12321205 is a deficient number, since it is larger than the sum of its proper divisors (3734219).

12321205 is a wasteful number, since it uses less digits than its factorization.

12321205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 12321205 is about 3510.1574038781. The cubic root of 12321205 is about 230.9675997610.

Adding to 12321205 its reverse (50212321), we get a palindrome (62533526).

The spelling of 12321205 in words is "twelve million, three hundred twenty-one thousand, two hundred five".