2112120111 has 4 divisors (see below), whose sum is σ = 2816160152. Its totient is φ = 1408080072.

The previous prime is 2112120097. The next prime is 2112120133. The reversal of 2112120111 is 1110212112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2112120111 - 2²⁶ = 2045011247 is a prime.

It is a super-2 number, since 2×2112120111² = 8922102726581304642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112120191) 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, 352020016 + ... + 352020021.

It is an arithmetic number, because the mean of its divisors is an integer number (704040038).

Almost surely, 2^2112120111 is an apocalyptic number.

2112120111 is a deficient number, since it is larger than the sum of its proper divisors (704040041).

2112120111 is an equidigital number, since it uses as much as digits as its factorization.

2112120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704040040.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 2112120111 is about 45957.8079438086. The cubic root of 2112120111 is about 1283.0380535168.

Adding to 2112120111 its reverse (1110212112), we get a palindrome (3222332223).

The spelling of 2112120111 in words is "two billion, one hundred twelve million, one hundred twenty thousand, one hundred eleven".