221322212 has 12 divisors (see below), whose sum is σ = 387943920. Its totient is φ = 110481096.

The previous prime is 221322193. The next prime is 221322293. The reversal of 221322212 is 212223122.

221322212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 42218 + ... + 47169.

It is an arithmetic number, because the mean of its divisors is an integer number (32328660).

Almost surely, 2^221322212 is an apocalyptic number.

It is an amenable number.

221322212 is a deficient number, since it is larger than the sum of its proper divisors (166621708).

221322212 is a wasteful number, since it uses less digits than its factorization.

221322212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90010 (or 90008 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 221322212 is about 14876.9019624383. The cubic root of 221322212 is about 604.8880443067. Note that the first 3 decimals are identical.

Adding to 221322212 its reverse (212223122), we get a palindrome (433545334).

It can be divided in two parts, 22132 and 2212, that multiplied together give a palindrome (48955984).

The spelling of 221322212 in words is "two hundred twenty-one million, three hundred twenty-two thousand, two hundred twelve".