221124212 has 12 divisors (see below), whose sum is σ = 393526560. Its totient is φ = 108688056.

The previous prime is 221124181. The next prime is 221124221. The reversal of 221124212 is 212421122.

221124212 is digitally balanced in base 2, base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

221124212 is strictly pandigital in base 9.

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, 468248 + ... + 468719.

It is an arithmetic number, because the mean of its divisors is an integer number (32793880).

Almost surely, 2^221124212 is an apocalyptic number.

It is an amenable number.

221124212 is a deficient number, since it is larger than the sum of its proper divisors (172402348).

221124212 is a wasteful number, since it uses less digits than its factorization.

221124212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937030 (or 937028 counting only the distinct ones).

The product of its digits is 128, while the sum is 17.

The square root of 221124212 is about 14870.2458621235. The cubic root of 221124212 is about 604.7076081827.

Adding to 221124212 its reverse (212421122), we get a palindrome (433545334).

The spelling of 221124212 in words is "two hundred twenty-one million, one hundred twenty-four thousand, two hundred twelve".