210222122022221 has 2 divisors, whose sum is σ = 210222122022222. Its totient is φ = 210222122022220.

The previous prime is 210222122022217. The next prime is 210222122022233. The reversal of 210222122022221 is 122220221222012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209906490422500 + 315631599721 = 14488150^2 + 561811^2 .

It is a cyclic number.

It is not a de Polignac number, because 210222122022221 - 2² = 210222122022217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210222122322221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105111061011110 + 105111061011111.

It is an arithmetic number, because the mean of its divisors is an integer number (105111061011111).

Almost surely, 2^{210222122022221} is an apocalyptic number.

It is an amenable number.

210222122022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

210222122022221 is an equidigital number, since it uses as much as digits as its factorization.

210222122022221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 210222122022221 its reverse (122220221222012), we get a palindrome (332442343244233).

The spelling of 210222122022221 in words is "two hundred ten trillion, two hundred twenty-two billion, one hundred twenty-two million, twenty-two thousand, two hundred twenty-one".