212066 has 4 divisors (see below), whose sum is σ = 318102. Its totient is φ = 106032.

The previous prime is 212057. The next prime is 212081. The reversal of 212066 is 660212.

212066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 207025 + 5041 = 455^2 + 71^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53015 + ... + 53018.

2²¹²⁰⁶⁶ is an apocalyptic number.

212066 is a deficient number, since it is larger than the sum of its proper divisors (106036).

212066 is a wasteful number, since it uses less digits than its factorization.

212066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106035.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 212066 is about 460.5062431716. The cubic root of 212066 is about 59.6335066761.

Adding to 212066 its reverse (660212), we get a palindrome (872278).

It can be divided in two parts, 21206 and 6, that added together give a palindrome (21212).

The spelling of 212066 in words is "two hundred twelve thousand, sixty-six".