12180216 has 32 divisors (see below), whose sum is σ = 32054400. Its totient is φ = 3846240.

The previous prime is 12180209. The next prime is 12180221. The reversal of 12180216 is 61208121.

It is a junction number, because it is equal to n+sod(n) for n = 12180192 and 12180201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12900 + ... + 13811.

It is an arithmetic number, because the mean of its divisors is an integer number (1001700).

Almost surely, 2^12180216 is an apocalyptic number.

It is an amenable number.

12180216 is an abundant number, since it is smaller than the sum of its proper divisors (19874184).

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

12180216 is a wasteful number, since it uses less digits than its factorization.

12180216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26739 (or 26735 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 12180216 is about 3490.0166188716. The cubic root of 12180216 is about 230.0832464886.

Adding to 12180216 its reverse (61208121), we get a palindrome (73388337).

The spelling of 12180216 in words is "twelve million, one hundred eighty thousand, two hundred sixteen".