211066820089 has 2 divisors, whose sum is σ = 211066820090. Its totient is φ = 211066820088.

The previous prime is 211066820077. The next prime is 211066820093. The reversal of 211066820089 is 980028660112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164781600489 + 46285219600 = 405933^2 + 215140^2 .

It is a cyclic number.

It is not a de Polignac number, because 211066820089 - 2²¹ = 211064722937 is a prime.

It is not a weakly prime, because it can be changed into another prime (211066820039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105533410044 + 105533410045.

It is an arithmetic number, because the mean of its divisors is an integer number (105533410045).

Almost surely, 2^211066820089 is an apocalyptic number.

It is an amenable number.

211066820089 is a deficient number, since it is larger than the sum of its proper divisors (1).

211066820089 is an equidigital number, since it uses as much as digits as its factorization.

211066820089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 211066820089 in words is "two hundred eleven billion, sixty-six million, eight hundred twenty thousand, eighty-nine".