1021200197 has 2 divisors, whose sum is σ = 1021200198. Its totient is φ = 1021200196.

The previous prime is 1021200119. The next prime is 1021200203. The reversal of 1021200197 is 7910021201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 933852481 + 87347716 = 30559^2 + 9346^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021200197 - 2⁸ = 1021199941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021200107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510600098 + 510600099.

It is an arithmetic number, because the mean of its divisors is an integer number (510600099).

Almost surely, 2^1021200197 is an apocalyptic number.

It is an amenable number.

1021200197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021200197 is an equidigital number, since it uses as much as digits as its factorization.

1021200197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 1021200197 is about 31956.2231341565. The cubic root of 1021200197 is about 1007.0173736141.

Adding to 1021200197 its reverse (7910021201), we get a palindrome (8931221398).

The spelling of 1021200197 in words is "one billion, twenty-one million, two hundred thousand, one hundred ninety-seven".