221033212 has 12 divisors (see below), whose sum is σ = 388773000. Its totient is φ = 109955216.

The previous prime is 221033177. The next prime is 221033249. The reversal of 221033212 is 212330122.

It is a congruent number.

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, 139462 + ... + 141037.

It is an arithmetic number, because the mean of its divisors is an integer number (32397750).

Almost surely, 2^221033212 is an apocalyptic number.

It is an amenable number.

221033212 is a deficient number, since it is larger than the sum of its proper divisors (167739788).

221033212 is a wasteful number, since it uses less digits than its factorization.

221033212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280700 (or 280698 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221033212 is about 14867.1857457960. The cubic root of 221033212 is about 604.6246443404.

Adding to 221033212 its reverse (212330122), we get a palindrome (433363334).

The spelling of 221033212 in words is "two hundred twenty-one million, thirty-three thousand, two hundred twelve".