212211120220221 has 16 divisors (see below), whose sum is σ = 289851267783168. Its totient is φ = 138022572422400.

The previous prime is 212211120220189. The next prime is 212211120220237. The reversal of 212211120220221 is 122022021112212.

It is not a de Polignac number, because 212211120220221 - 2⁵ = 212211120220189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211120220241) 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, 13015401 + ... + 24368481.

It is an arithmetic number, because the mean of its divisors is an integer number (18115704236448).

Almost surely, 2^{212211120220221} is an apocalyptic number.

It is an amenable number.

212211120220221 is a deficient number, since it is larger than the sum of its proper divisors (77640147562947).

212211120220221 is a wasteful number, since it uses less digits than its factorization.

212211120220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11505092.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212211120220221 its reverse (122022021112212), we get a palindrome (334233141332433).

The spelling of 212211120220221 in words is "two hundred twelve trillion, two hundred eleven billion, one hundred twenty million, two hundred twenty thousand, two hundred twenty-one".