12205212 has 24 divisors (see below), whose sum is σ = 28963200. Its totient is φ = 3999216.

The previous prime is 12205181. The next prime is 12205213. The reversal of 12205212 is 21250221.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 12205191 and 12205200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12205213) 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 7 ways as a sum of consecutive naturals, for example, 7912 + ... + 9327.

It is an arithmetic number, because the mean of its divisors is an integer number (1206800).

Almost surely, 2^12205212 is an apocalyptic number.

12205212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12205212 is an abundant number, since it is smaller than the sum of its proper divisors (16757988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12205212 is a wasteful number, since it uses less digits than its factorization.

12205212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17305 (or 17303 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12205212 is about 3493.5958552758. The cubic root of 12205212 is about 230.2405297193.

Adding to 12205212 its reverse (21250221), we get a palindrome (33455433).

The spelling of 12205212 in words is "twelve million, two hundred five thousand, two hundred twelve".