2111122666 has 8 divisors (see below), whose sum is σ = 3304365984. Its totient is φ = 1009667340.

The previous prime is 2111122649. The next prime is 2111122667. The reversal of 2111122666 is 6662211112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2111122667) 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 in 3 ways as a sum of consecutive naturals, for example, 22946940 + ... + 22947031.

It is an arithmetic number, because the mean of its divisors is an integer number (413045748).

Almost surely, 2^2111122666 is an apocalyptic number.

2111122666 is a deficient number, since it is larger than the sum of its proper divisors (1193243318).

2111122666 is a wasteful number, since it uses less digits than its factorization.

2111122666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45893996.

The product of its digits is 1728, while the sum is 28.

The square root of 2111122666 is about 45946.9549154239. The cubic root of 2111122666 is about 1282.8360508952.

Adding to 2111122666 its reverse (6662211112), we get a palindrome (8773333778).

The spelling of 2111122666 in words is "two billion, one hundred eleven million, one hundred twenty-two thousand, six hundred sixty-six".