1005202020197 has 2 divisors, whose sum is σ = 1005202020198. Its totient is φ = 1005202020196.

The previous prime is 1005202020133. The next prime is 1005202020257. The reversal of 1005202020197 is 7910202025001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741525932161 + 263676088036 = 861119^2 + 513494^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005202020197 - 2⁶ = 1005202020133 is a prime.

It is a super-2 number, since 2×1005202020197² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005202020497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502601010098 + 502601010099.

It is an arithmetic number, because the mean of its divisors is an integer number (502601010099).

Almost surely, 2^{1005202020197} is an apocalyptic number.

It is an amenable number.

1005202020197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005202020197 is an equidigital number, since it uses as much as digits as its factorization.

1005202020197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

Adding to 1005202020197 its reverse (7910202025001), we get a palindrome (8915404045198).

The spelling of 1005202020197 in words is "one trillion, five billion, two hundred two million, twenty thousand, one hundred ninety-seven".