2211666110393 has 2 divisors, whose sum is σ = 2211666110394. Its totient is φ = 2211666110392.

The previous prime is 2211666110309. The next prime is 2211666110429. The reversal of 2211666110393 is 3930116661122.

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., 2191501258384 + 20164852009 = 1480372^2 + 142003^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211666110393 - 2¹⁴ = 2211666094009 is a prime.

It is a super-2 number, since 2×2211666110393² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2211666110393.

It is not a weakly prime, because it can be changed into another prime (2211666110293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105833055196 + 1105833055197.

It is an arithmetic number, because the mean of its divisors is an integer number (1105833055197).

Almost surely, 2^{2211666110393} is an apocalyptic number.

It is an amenable number.

2211666110393 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211666110393 is an equidigital number, since it uses as much as digits as its factorization.

2211666110393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 2211666110393 in words is "two trillion, two hundred eleven billion, six hundred sixty-six million, one hundred ten thousand, three hundred ninety-three".