212221120 has 28 divisors (see below), whose sum is σ = 505352304. Its totient is φ = 84888320.

The previous prime is 212221067. The next prime is 212221153. The reversal of 212221120 is 21122212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212221120.

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, 331276 + ... + 331915.

Almost surely, 2^212221120 is an apocalyptic number.

212221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221120 is an abundant number, since it is smaller than the sum of its proper divisors (293131184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212221120 is an equidigital number, since it uses as much as digits as its factorization.

212221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663208 (or 663198 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 212221120 is about 14567.8110915813. The cubic root of 212221120 is about 596.4804318052.

Adding to 212221120 its reverse (21122212), we get a palindrome (233343332).

The spelling of 212221120 in words is "two hundred twelve million, two hundred twenty-one thousand, one hundred twenty".