2012221111 has 2 divisors, whose sum is σ = 2012221112. Its totient is φ = 2012221110.

The previous prime is 2012221097. The next prime is 2012221121. The reversal of 2012221111 is 1111222102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2012221111 - 2⁹ = 2012220599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012221091 and 2012221100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012221121) 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 as a sum of consecutive naturals, namely, 1006110555 + 1006110556.

It is an arithmetic number, because the mean of its divisors is an integer number (1006110556).

Almost surely, 2^2012221111 is an apocalyptic number.

2012221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012221111 is an equidigital number, since it uses as much as digits as its factorization.

2012221111 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2012221111 is about 44857.7876293515. The cubic root of 2012221111 is about 1262.4821129512.

Adding to 2012221111 its reverse (1111222102), we get a palindrome (3123443213).

Subtracting from 2012221111 its reverse (1111222102), we obtain a palindrome (900999009).

The spelling of 2012221111 in words is "two billion, twelve million, two hundred twenty-one thousand, one hundred eleven".