211100170121 has 2 divisors, whose sum is σ = 211100170122. Its totient is φ = 211100170120.

The previous prime is 211100170109. The next prime is 211100170153. The reversal of 211100170121 is 121071001112.

211100170121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111836736400 + 99263433721 = 334420^2 + 315061^2 .

It is a cyclic number.

It is not a de Polignac number, because 211100170121 - 2¹⁰ = 211100169097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211100170121.

It is not a weakly prime, because it can be changed into another prime (211100370121) 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, 105550085060 + 105550085061.

It is an arithmetic number, because the mean of its divisors is an integer number (105550085061).

Almost surely, 2^211100170121 is an apocalyptic number.

It is an amenable number.

211100170121 is a deficient number, since it is larger than the sum of its proper divisors (1).

211100170121 is an equidigital number, since it uses as much as digits as its factorization.

211100170121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 17.

Adding to 211100170121 its reverse (121071001112), we get a palindrome (332171171233).

The spelling of 211100170121 in words is "two hundred eleven billion, one hundred million, one hundred seventy thousand, one hundred twenty-one".