201100220173 has 2 divisors, whose sum is σ = 201100220174. Its totient is φ = 201100220172.

The previous prime is 201100220117. The next prime is 201100220221. The reversal of 201100220173 is 371022001102.

201100220173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197116464484 + 3983755689 = 443978^2 + 63117^2 .

It is a cyclic number.

It is not a de Polignac number, because 201100220173 - 2²¹ = 201098123021 is a prime.

It is a super-2 number, since 2×201100220173² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201100220173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201100920173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100550110086 + 100550110087.

It is an arithmetic number, because the mean of its divisors is an integer number (100550110087).

Almost surely, 2^201100220173 is an apocalyptic number.

It is an amenable number.

201100220173 is a deficient number, since it is larger than the sum of its proper divisors (1).

201100220173 is an equidigital number, since it uses as much as digits as its factorization.

201100220173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 201100220173 its reverse (371022001102), we get a palindrome (572122221275).

The spelling of 201100220173 in words is "two hundred one billion, one hundred million, two hundred twenty thousand, one hundred seventy-three".