211944485189 has 2 divisors, whose sum is σ = 211944485190. Its totient is φ = 211944485188.

The previous prime is 211944485183. The next prime is 211944485209. The reversal of 211944485189 is 981584449112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136877800900 + 75066684289 = 369970^2 + 273983^2 .

It is a cyclic number.

It is not a de Polignac number, because 211944485189 - 2²⁰ = 211943436613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211944485183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105972242594 + 105972242595.

It is an arithmetic number, because the mean of its divisors is an integer number (105972242595).

Almost surely, 2^211944485189 is an apocalyptic number.

It is an amenable number.

211944485189 is a deficient number, since it is larger than the sum of its proper divisors (1).

211944485189 is an equidigital number, since it uses as much as digits as its factorization.

211944485189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3317760, while the sum is 56.

The spelling of 211944485189 in words is "two hundred eleven billion, nine hundred forty-four million, four hundred eighty-five thousand, one hundred eighty-nine".