212221222211 has 8 divisors (see below), whose sum is σ = 218199565248. Its totient is φ = 206281080000.

The previous prime is 212221222207. The next prime is 212221222231. The reversal of 212221222211 is 112222122212.

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

It is a cyclic number.

It is not a de Polignac number, because 212221222211 - 2² = 212221222207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221222201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9538940 + ... + 9561161.

It is an arithmetic number, because the mean of its divisors is an integer number (27274945656).

Almost surely, 2^212221222211 is an apocalyptic number.

212221222211 is a deficient number, since it is larger than the sum of its proper divisors (5978343037).

212221222211 is a wasteful number, since it uses less digits than its factorization.

212221222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19100413.

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

Adding to 212221222211 its reverse (112222122212), we get a palindrome (324443344423).

Subtracting from 212221222211 its reverse (112222122212), we obtain a palindrome (99999099999).

The spelling of 212221222211 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred eleven".