12018212 has 6 divisors (see below), whose sum is σ = 21031878. Its totient is φ = 6009104.

The previous prime is 12018211. The next prime is 12018217. The reversal of 12018212 is 21281021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7107556 + 4910656 = 2666^2 + 2216^2 .

It is not an unprimeable number, because it can be changed into a prime (12018211) 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 as a sum of consecutive naturals, namely, 1502273 + ... + 1502280.

It is an arithmetic number, because the mean of its divisors is an integer number (3505313).

Almost surely, 2^12018212 is an apocalyptic number.

It is an amenable number.

12018212 is a deficient number, since it is larger than the sum of its proper divisors (9013666).

12018212 is a wasteful number, since it uses less digits than its factorization.

12018212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004557 (or 3004555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 12018212 is about 3466.7292943061. The cubic root of 12018212 is about 229.0586096114.

Adding to 12018212 its reverse (21281021), we get a palindrome (33299233).

The spelling of 12018212 in words is "twelve million, eighteen thousand, two hundred twelve".