210220221020197 has 2 divisors, whose sum is σ = 210220221020198. Its totient is φ = 210220221020196.

The previous prime is 210220221020191. The next prime is 210220221020279. The reversal of 210220221020197 is 791020122022012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208406353473796 + 1813867546401 = 14436286^2 + 1346799^2 .

It is a cyclic number.

It is not a de Polignac number, because 210220221020197 - 2³ = 210220221020189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210220221020191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110110510098 + 105110110510099.

It is an arithmetic number, because the mean of its divisors is an integer number (105110110510099).

Almost surely, 2^{210220221020197} is an apocalyptic number.

It is an amenable number.

210220221020197 is a deficient number, since it is larger than the sum of its proper divisors (1).

210220221020197 is an equidigital number, since it uses as much as digits as its factorization.

210220221020197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 210220221020197 in words is "two hundred ten trillion, two hundred twenty billion, two hundred twenty-one million, twenty thousand, one hundred ninety-seven".