12231205 has 16 divisors (see below), whose sum is σ = 17316864. Its totient is φ = 8115840.

The previous prime is 12231203. The next prime is 12231227. The reversal of 12231205 is 50213221.

12231205 = 121² + 122² + ... + 337².

It is not a de Polignac number, because 12231205 - 2¹ = 12231203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231203) by changing a digit.

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, 4552 + ... + 6721.

It is an arithmetic number, because the mean of its divisors is an integer number (1082304).

Almost surely, 2^12231205 is an apocalyptic number.

It is an amenable number.

12231205 is a deficient number, since it is larger than the sum of its proper divisors (5085659).

12231205 is a wasteful number, since it uses less digits than its factorization.

12231205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11316.

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

The square root of 12231205 is about 3497.3139693199. The cubic root of 12231205 is about 230.4038588141.

Adding to 12231205 its reverse (50213221), we get a palindrome (62444426).

The spelling of 12231205 in words is "twelve million, two hundred thirty-one thousand, two hundred five".