212211222222 has 32 divisors (see below), whose sum is σ = 427799988000. Its totient is φ = 70176210048.

The previous prime is 212211222193. The next prime is 212211222227. The reversal of 212211222222 is 222222112212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211222227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155304 + ... + 669732.

It is an arithmetic number, because the mean of its divisors is an integer number (13368749625).

Almost surely, 2^212211222222 is an apocalyptic number.

212211222222 is an abundant number, since it is smaller than the sum of its proper divisors (215588765778).

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

212211222222 is a wasteful number, since it uses less digits than its factorization.

212211222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514980.

The product of its digits is 512, while the sum is 21.

Adding to 212211222222 its reverse (222222112212), we get a palindrome (434433334434).

The spelling of 212211222222 in words is "two hundred twelve billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".