20212000212221 has 2 divisors, whose sum is σ = 20212000212222. Its totient is φ = 20212000212220.

The previous prime is 20212000212199. The next prime is 20212000212223. The reversal of 20212000212221 is 12221200021202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13865278879321 + 6346721332900 = 3723611^2 + 2519270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212000212221 is a prime.

Together with 20212000212223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20212000212221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212000212223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106000106110 + 10106000106111.

It is an arithmetic number, because the mean of its divisors is an integer number (10106000106111).

Almost surely, 2^{20212000212221} is an apocalyptic number.

It is an amenable number.

20212000212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212000212221 is an equidigital number, since it uses as much as digits as its factorization.

20212000212221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20212000212221 its reverse (12221200021202), we get a palindrome (32433200233423).

The spelling of 20212000212221 in words is "twenty trillion, two hundred twelve billion, two hundred twelve thousand, two hundred twenty-one".