212121220222 has 8 divisors (see below), whose sum is σ = 324185261256. Its totient is φ = 104059466472.

The previous prime is 212121220153. The next prime is 212121220247. The reversal of 212121220222 is 222022121212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 212121220222.

It is a congruent number.

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, 1000571688 + ... + 1000571899.

It is an arithmetic number, because the mean of its divisors is an integer number (40523157657).

Almost surely, 2^212121220222 is an apocalyptic number.

212121220222 is a deficient number, since it is larger than the sum of its proper divisors (112064041034).

212121220222 is a wasteful number, since it uses less digits than its factorization.

212121220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001143642.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 212121220222 its reverse (222022121212), we get a palindrome (434143341434).

The spelling of 212121220222 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-two".