2001201101173 has 2 divisors, whose sum is σ = 2001201101174. Its totient is φ = 2001201101172.

The previous prime is 2001201101171. The next prime is 2001201101233. The reversal of 2001201101173 is 3711011021002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1658060549649 + 343140551524 = 1287657^2 + 585782^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001201101173 - 2¹ = 2001201101171 is a prime.

Together with 2001201101171, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2001201101173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001201101171) 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, 1000600550586 + 1000600550587.

It is an arithmetic number, because the mean of its divisors is an integer number (1000600550587).

Almost surely, 2^{2001201101173} is an apocalyptic number.

It is an amenable number.

2001201101173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001201101173 is an equidigital number, since it uses as much as digits as its factorization.

2001201101173 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 19.

Adding to 2001201101173 its reverse (3711011021002), we get a palindrome (5712212122175).

The spelling of 2001201101173 in words is "two trillion, one billion, two hundred one million, one hundred one thousand, one hundred seventy-three".