212211222 has 16 divisors (see below), whose sum is σ = 429795840. Its totient is φ = 69841512.

The previous prime is 212211193. The next prime is 212211269. The reversal of 212211222 is 222112212.

212211222 is digitally balanced in base 3, because in such base 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.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223378 + ... + 224325.

It is an arithmetic number, because the mean of its divisors is an integer number (26862240).

Almost surely, 2^212211222 is an apocalyptic number.

212211222 is an abundant number, since it is smaller than the sum of its proper divisors (217584618).

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

212211222 is a wasteful number, since it uses less digits than its factorization.

212211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447787.

The product of its digits is 64, while the sum is 15.

The square root of 212211222 is about 14567.4713660264. The cubic root of 212211222 is about 596.4711583721.

Adding to 212211222 its reverse (222112212), we get a palindrome (434323434).

The spelling of 212211222 in words is "two hundred twelve million, two hundred eleven thousand, two hundred twenty-two".