212221100110221 has 8 divisors (see below), whose sum is σ = 314401629792960. Its totient is φ = 141480733406796.

The previous prime is 212221100110213. The next prime is 212221100110223. The reversal of 212221100110221 is 122011001122212.

212221100110221 is a `hidden beast` number, since 2 + 1 + 222 + 110 + 0 + 110 + 221 = 666.

It is not a de Polignac number, because 212221100110221 - 2³ = 212221100110213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212221100110194 and 212221100110203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221100110223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3930020372385 + ... + 3930020372438.

It is an arithmetic number, because the mean of its divisors is an integer number (39300203724120).

Almost surely, 2^{212221100110221} is an apocalyptic number.

It is an amenable number.

212221100110221 is a deficient number, since it is larger than the sum of its proper divisors (102180529682739).

212221100110221 is an equidigital number, since it uses as much as digits as its factorization.

212221100110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7860040744832 (or 7860040744826 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212221100110221 its reverse (122011001122212), we get a palindrome (334232101232433).

The spelling of 212221100110221 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred million, one hundred ten thousand, two hundred twenty-one".