2021197 has 2 divisors, whose sum is σ = 2021198. Its totient is φ = 2021196.

The previous prime is 2021191. The next prime is 2021203. The reversal of 2021197 is 7911202.

It is a balanced prime because it is at equal distance from previous prime (2021191) and next prime (2021203).

It can be written as a sum of positive squares in only one way, i.e., 1990921 + 30276 = 1411^2 + 174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010598 + 1010599.

It is an arithmetic number, because the mean of its divisors is an integer number (1010599).

2^2021197 is an apocalyptic number.

It is an amenable number.

2021197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021197 is an equidigital number, since it uses as much as digits as its factorization.

2021197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 2021197 is about 1421.6880811205. The cubic root of 2021197 is about 126.4356507955.

Adding to 2021197 its reverse (7911202), we get a palindrome (9932399).

The spelling of 2021197 in words is "two million, twenty-one thousand, one hundred ninety-seven".