2191112266 has 8 divisors (see below), whose sum is σ = 3756192480. Its totient is φ = 939048108.

The previous prime is 2191112263. The next prime is 2191112267. The reversal of 2191112266 is 6622111912.

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 (2191112263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78253996 + ... + 78254023.

It is an arithmetic number, because the mean of its divisors is an integer number (469524060).

Almost surely, 2^2191112266 is an apocalyptic number.

2191112266 is a deficient number, since it is larger than the sum of its proper divisors (1565080214).

2191112266 is a wasteful number, since it uses less digits than its factorization.

2191112266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156508028.

The product of its digits is 2592, while the sum is 31.

The square root of 2191112266 is about 46809.3181535472. The cubic root of 2191112266 is about 1298.8376723172.

The spelling of 2191112266 in words is "two billion, one hundred ninety-one million, one hundred twelve thousand, two hundred sixty-six".