2211166123 has 2 divisors, whose sum is σ = 2211166124. Its totient is φ = 2211166122.

The previous prime is 2211166117. The next prime is 2211166147. The reversal of 2211166123 is 3216611122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2211166123 - 2⁵ = 2211166091 is a prime.

It is a super-2 number, since 2×2211166123² = 9778511247005702258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2211166193) 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, 1105583061 + 1105583062.

It is an arithmetic number, because the mean of its divisors is an integer number (1105583062).

Almost surely, 2^2211166123 is an apocalyptic number.

2211166123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211166123 is an equidigital number, since it uses as much as digits as its factorization.

2211166123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 2211166123 is about 47023.0382153259. The cubic root of 2211166123 is about 1302.7881231099.

Adding to 2211166123 its reverse (3216611122), we get a palindrome (5427777245).

The spelling of 2211166123 in words is "two billion, two hundred eleven million, one hundred sixty-six thousand, one hundred twenty-three".