2211666110309 has 2 divisors, whose sum is σ = 2211666110310. Its totient is φ = 2211666110308.

The previous prime is 2211666110293. The next prime is 2211666110393. The reversal of 2211666110309 is 9030116661122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1999670325409 + 211995784900 = 1414097^2 + 460430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211666110309 - 2⁴ = 2211666110293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211666110209) 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, 1105833055154 + 1105833055155.

It is an arithmetic number, because the mean of its divisors is an integer number (1105833055155).

Almost surely, 2^{2211666110309} is an apocalyptic number.

It is an amenable number.

2211666110309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211666110309 is an equidigital number, since it uses as much as digits as its factorization.

2211666110309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 2211666110309 in words is "two trillion, two hundred eleven billion, six hundred sixty-six million, one hundred ten thousand, three hundred nine".