12199212 has 18 divisors (see below), whose sum is σ = 30836988. Its totient is φ = 4066392.

The previous prime is 12199211. The next prime is 12199237. The reversal of 12199212 is 21299121.

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (12199211) 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 5 ways as a sum of consecutive naturals, for example, 169398 + ... + 169469.

It is an arithmetic number, because the mean of its divisors is an integer number (1713166).

Almost surely, 2^12199212 is an apocalyptic number.

12199212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12199212 is an abundant number, since it is smaller than the sum of its proper divisors (18637776).

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

12199212 is a wasteful number, since it uses less digits than its factorization.

12199212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338877 (or 338872 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 12199212 is about 3492.7370356212. The cubic root of 12199212 is about 230.2027953041.

Subtracting 12199212 from its reverse (21299121), we obtain a palindrome (9099909).

The spelling of 12199212 in words is "twelve million, one hundred ninety-nine thousand, two hundred twelve".