2021022197 has 2 divisors, whose sum is σ = 2021022198. Its totient is φ = 2021022196.

The previous prime is 2021022181. The next prime is 2021022217. The reversal of 2021022197 is 7912201202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1922734801 + 98287396 = 43849^2 + 9914^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021022197 - 2⁴ = 2021022181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021022697) 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 as a sum of consecutive naturals, namely, 1010511098 + 1010511099.

It is an arithmetic number, because the mean of its divisors is an integer number (1010511099).

Almost surely, 2^2021022197 is an apocalyptic number.

It is an amenable number.

2021022197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021022197 is an equidigital number, since it uses as much as digits as its factorization.

2021022197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 2021022197 is about 44955.7804625835. The cubic root of 2021022197 is about 1264.3200576594.

Adding to 2021022197 its reverse (7912201202), we get a palindrome (9933223399).

The spelling of 2021022197 in words is "two billion, twenty-one million, twenty-two thousand, one hundred ninety-seven".