2112220111 has 4 divisors (see below), whose sum is σ = 2204055792. Its totient is φ = 2020384432.

The previous prime is 2112220079. The next prime is 2112220151. The reversal of 2112220111 is 1110222112.

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

It is a cyclic number.

It is not a de Polignac number, because 2112220111 - 2⁵ = 2112220079 is a prime.

It is a super-2 number, since 2×2112220111² = 8922947594625704642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112220091 and 2112220100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112220151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45917806 + ... + 45917851.

It is an arithmetic number, because the mean of its divisors is an integer number (551013948).

Almost surely, 2^2112220111 is an apocalyptic number.

2112220111 is a deficient number, since it is larger than the sum of its proper divisors (91835681).

2112220111 is an equidigital number, since it uses as much as digits as its factorization.

2112220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91835680.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2112220111 is about 45958.8958853452. The cubic root of 2112220111 is about 1283.0583020150.

Adding to 2112220111 its reverse (1110222112), we get a palindrome (3222442223).

The spelling of 2112220111 in words is "two billion, one hundred twelve million, two hundred twenty thousand, one hundred eleven".