2211166117 has 2 divisors, whose sum is σ = 2211166118. Its totient is φ = 2211166116.

The previous prime is 2211166091. The next prime is 2211166123. The reversal of 2211166117 is 7116611122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1516790916 + 694375201 = 38946^2 + 26351^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211166117 - 2²⁷ = 2076948389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211166147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105583058 + 1105583059.

It is an arithmetic number, because the mean of its divisors is an integer number (1105583059).

Almost surely, 2^2211166117 is an apocalyptic number.

It is an amenable number.

2211166117 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211166117 is an equidigital number, since it uses as much as digits as its factorization.

2211166117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 28.

The square root of 2211166117 is about 47023.0381515274. The cubic root of 2211166117 is about 1302.7881219315.

Adding to 2211166117 its reverse (7116611122), we get a palindrome (9327777239).

The spelling of 2211166117 in words is "two billion, two hundred eleven million, one hundred sixty-six thousand, one hundred seventeen".