211671020171189 has 2 divisors, whose sum is σ = 211671020171190. Its totient is φ = 211671020171188.

The previous prime is 211671020171183. The next prime is 211671020171279. The reversal of 211671020171189 is 981171020176112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119005561007089 + 92665459164100 = 10908967^2 + 9626290^2 .

It is a cyclic number.

It is not a de Polignac number, because 211671020171189 - 2⁸ = 211671020170933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211671020171183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105835510085594 + 105835510085595.

It is an arithmetic number, because the mean of its divisors is an integer number (105835510085595).

Almost surely, 2^{211671020171189} is an apocalyptic number.

It is an amenable number.

211671020171189 is a deficient number, since it is larger than the sum of its proper divisors (1).

211671020171189 is an equidigital number, since it uses as much as digits as its factorization.

211671020171189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 47.

The spelling of 211671020171189 in words is "two hundred eleven trillion, six hundred seventy-one billion, twenty million, one hundred seventy-one thousand, one hundred eighty-nine".