200120001000173 has 2 divisors, whose sum is σ = 200120001000174. Its totient is φ = 200120001000172.

The previous prime is 200120001000167. The next prime is 200120001000233. The reversal of 200120001000173 is 371000100021002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132592415354884 + 67527585645289 = 11514878^2 + 8217517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200120001000173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200120001000103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060000500086 + 100060000500087.

It is an arithmetic number, because the mean of its divisors is an integer number (100060000500087).

Almost surely, 2^{200120001000173} is an apocalyptic number.

It is an amenable number.

200120001000173 is a deficient number, since it is larger than the sum of its proper divisors (1).

200120001000173 is an equidigital number, since it uses as much as digits as its factorization.

200120001000173 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 200120001000173 its reverse (371000100021002), we get a palindrome (571120101021175).

The spelling of 200120001000173 in words is "two hundred trillion, one hundred twenty billion, one million, one hundred seventy-three", and thus it is an aban number.