2012221222111 has 4 divisors (see below), whose sum is σ = 2012230268824. Its totient is φ = 2012212175400.

The previous prime is 2012221222079. The next prime is 2012221222127. The reversal of 2012221222111 is 1112221222102.

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 2012221222111 - 2⁵ = 2012221222079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012221229111) 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, 4181085 + ... + 4637446.

It is an arithmetic number, because the mean of its divisors is an integer number (503057567206).

Almost surely, 2^{2012221222111} is an apocalyptic number.

2012221222111 is a deficient number, since it is larger than the sum of its proper divisors (9046713).

2012221222111 is an equidigital number, since it uses as much as digits as its factorization.

2012221222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9046712.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2012221222111 its reverse (1112221222102), we get a palindrome (3124442444213).

Subtracting from 2012221222111 its reverse (1112221222102), we obtain a palindrome (900000000009).

The spelling of 2012221222111 in words is "two trillion, twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".