212221322211 has 4 divisors (see below), whose sum is σ = 282961762952. Its totient is φ = 141480881472.

The previous prime is 212221322189. The next prime is 212221322231. The reversal of 212221322211 is 112223122212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212221322211 - 2¹⁹ = 212220797923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221322231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35370220366 + ... + 35370220371.

It is an arithmetic number, because the mean of its divisors is an integer number (70740440738).

Almost surely, 2^212221322211 is an apocalyptic number.

212221322211 is a deficient number, since it is larger than the sum of its proper divisors (70740440741).

212221322211 is an equidigital number, since it uses as much as digits as its factorization.

212221322211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70740440740.

The product of its digits is 384, while the sum is 21.

Adding to 212221322211 its reverse (112223122212), we get a palindrome (324444444423).

The spelling of 212221322211 in words is "two hundred twelve billion, two hundred twenty-one million, three hundred twenty-two thousand, two hundred eleven".