212121212222 has 32 divisors (see below), whose sum is σ = 341847674784. Its totient is φ = 98364672000.

The previous prime is 212121212209. The next prime is 212121212257. The reversal of 212121212222 is 222212121212.

212121212222 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 junction number, because it is equal to n+sod(n) for n = 212121212194 and 212121212203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578198 + ... + 870950.

It is an arithmetic number, because the mean of its divisors is an integer number (10682739837).

Almost surely, 2^212121212222 is an apocalyptic number.

212121212222 is a deficient number, since it is larger than the sum of its proper divisors (129726462562).

212121212222 is a wasteful number, since it uses less digits than its factorization.

212121212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293084.

The product of its digits is 256, while the sum is 20.

Adding to 212121212222 its reverse (222212121212), we get a palindrome (434333333434).

The spelling of 212121212222 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty-two".