212100221222 has 16 divisors (see below), whose sum is σ = 334915948800. Its totient is φ = 100462267080.

The previous prime is 212100221209. The next prime is 212100221237. The reversal of 212100221222 is 222122001212.

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 212100221222.

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, 475679 + ... + 806517.

It is an arithmetic number, because the mean of its divisors is an integer number (20932246800).

Almost surely, 2^212100221222 is an apocalyptic number.

212100221222 is a deficient number, since it is larger than the sum of its proper divisors (122815727578).

212100221222 is a wasteful number, since it uses less digits than its factorization.

212100221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347731.

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

Adding to 212100221222 its reverse (222122001212), we get a palindrome (434222222434).

The spelling of 212100221222 in words is "two hundred twelve billion, one hundred million, two hundred twenty-one thousand, two hundred twenty-two".