211020212171 has 2 divisors, whose sum is σ = 211020212172. Its totient is φ = 211020212170.

The previous prime is 211020212153. The next prime is 211020212231. The reversal of 211020212171 is 171212020112.

It is a happy number.

211020212171 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 is a cyclic number.

It is not a de Polignac number, because 211020212171 - 2¹⁸ = 211019950027 is a prime.

It is not a weakly prime, because it can be changed into another prime (211020212111) 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, 105510106085 + 105510106086.

It is an arithmetic number, because the mean of its divisors is an integer number (105510106086).

Almost surely, 2^211020212171 is an apocalyptic number.

211020212171 is a deficient number, since it is larger than the sum of its proper divisors (1).

211020212171 is an equidigital number, since it uses as much as digits as its factorization.

211020212171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 211020212171 its reverse (171212020112), we get a palindrome (382232232283).

The spelling of 211020212171 in words is "two hundred eleven billion, twenty million, two hundred twelve thousand, one hundred seventy-one".