20222212100221 has 2 divisors, whose sum is σ = 20222212100222. Its totient is φ = 20222212100220.

The previous prime is 20222212100161. The next prime is 20222212100227. The reversal of 20222212100221 is 12200121222202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20136354896025 + 85857204196 = 4487355^2 + 293014^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222212100221 - 2¹¹ = 20222212098173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20222212100227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111106050110 + 10111106050111.

It is an arithmetic number, because the mean of its divisors is an integer number (10111106050111).

Almost surely, 2^{20222212100221} is an apocalyptic number.

It is an amenable number.

20222212100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222212100221 is an equidigital number, since it uses as much as digits as its factorization.

20222212100221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20222212100221 its reverse (12200121222202), we get a palindrome (32422333322423).

The spelling of 20222212100221 in words is "twenty trillion, two hundred twenty-two billion, two hundred twelve million, one hundred thousand, two hundred twenty-one".