212221132 has 12 divisors (see below), whose sum is σ = 393233400. Its totient is φ = 99868736.

The previous prime is 212221067. The next prime is 212221153. The reversal of 212221132 is 231122212.

It is a happy number.

212221132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212221132² = 90075617734722848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560382 + ... + 1560517.

It is an arithmetic number, because the mean of its divisors is an integer number (32769450).

Almost surely, 2^212221132 is an apocalyptic number.

It is an amenable number.

212221132 is a deficient number, since it is larger than the sum of its proper divisors (181012268).

212221132 is a wasteful number, since it uses less digits than its factorization.

212221132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120920 (or 3120918 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 212221132 is about 14567.8115034483. The cubic root of 212221132 is about 596.4804430479.

Adding to 212221132 its reverse (231122212), we get a palindrome (443343344).

The spelling of 212221132 in words is "two hundred twelve million, two hundred twenty-one thousand, one hundred thirty-two".