201020100173 has 2 divisors, whose sum is σ = 201020100174. Its totient is φ = 201020100172.

The previous prime is 201020100167. The next prime is 201020100289. The reversal of 201020100173 is 371001020102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170603693764 + 30416406409 = 413042^2 + 174403^2 .

It is a cyclic number.

It is not a de Polignac number, because 201020100173 - 2¹⁰ = 201020099149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201020100103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510050086 + 100510050087.

It is an arithmetic number, because the mean of its divisors is an integer number (100510050087).

Almost surely, 2^201020100173 is an apocalyptic number.

It is an amenable number.

201020100173 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020100173 is an equidigital number, since it uses as much as digits as its factorization.

201020100173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

Adding to 201020100173 its reverse (371001020102), we get a palindrome (572021120275).

The spelling of 201020100173 in words is "two hundred one billion, twenty million, one hundred thousand, one hundred seventy-three".