221022412 has 12 divisors (see below), whose sum is σ = 416542336. Its totient is φ = 102010320.

The previous prime is 221022407. The next prime is 221022469. The reversal of 221022412 is 214220122.

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, 2125164 + ... + 2125267.

Almost surely, 2^221022412 is an apocalyptic number.

It is an amenable number.

221022412 is a deficient number, since it is larger than the sum of its proper divisors (195519924).

221022412 is a wasteful number, since it uses less digits than its factorization.

221022412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250448 (or 4250446 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 221022412 is about 14866.8225253415. The cubic root of 221022412 is about 604.6147965707.

Adding to 221022412 its reverse (214220122), we get a palindrome (435242534).

The spelling of 221022412 in words is "two hundred twenty-one million, twenty-two thousand, four hundred twelve".