12132218 has 16 divisors (see below), whose sum is σ = 20848320. Its totient is φ = 5186976.

The previous prime is 12132217. The next prime is 12132223. The reversal of 12132218 is 81223121.

It is a self number, because there is not a number n which added to its sum of digits gives 12132218.

It is not an unprimeable number, because it can be changed into a prime (12132217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7205 + ... + 8727.

It is an arithmetic number, because the mean of its divisors is an integer number (1303020).

Almost surely, 2^12132218 is an apocalyptic number.

12132218 is a deficient number, since it is larger than the sum of its proper divisors (8716102).

12132218 is a wasteful number, since it uses less digits than its factorization.

12132218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101.

The product of its digits is 192, while the sum is 20.

The square root of 12132218 is about 3483.1333594911. The cubic root of 12132218 is about 229.7806225791.

Adding to 12132218 its reverse (81223121), we get a palindrome (93355339).

The spelling of 12132218 in words is "twelve million, one hundred thirty-two thousand, two hundred eighteen".