211065256451171 has 2 divisors, whose sum is σ = 211065256451172. Its totient is φ = 211065256451170.

The previous prime is 211065256451143. The next prime is 211065256451239. The reversal of 211065256451171 is 171154652560112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211065256451171 - 2¹⁸ = 211065256189027 is a prime.

It is not a weakly prime, because it can be changed into another prime (211065256451671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105532628225585 + 105532628225586.

It is an arithmetic number, because the mean of its divisors is an integer number (105532628225586).

Almost surely, 2^{211065256451171} is an apocalyptic number.

211065256451171 is a deficient number, since it is larger than the sum of its proper divisors (1).

211065256451171 is an equidigital number, since it uses as much as digits as its factorization.

211065256451171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504000, while the sum is 47.

The spelling of 211065256451171 in words is "two hundred eleven trillion, sixty-five billion, two hundred fifty-six million, four hundred fifty-one thousand, one hundred seventy-one".