111121102222111 has 2 divisors, whose sum is σ = 111121102222112. Its totient is φ = 111121102222110.

The previous prime is 111121102222051. The next prime is 111121102222171. The reversal of 111121102222111 is 111222201121111.

It is a balanced prime because it is at equal distance from previous prime (111121102222051) and next prime (111121102222171).

It is an emirp because it is prime and its reverse (111222201121111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111121102222111 - 2⁴¹ = 108922078966559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111121102222171) 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 as a sum of consecutive naturals, namely, 55560551111055 + 55560551111056.

It is an arithmetic number, because the mean of its divisors is an integer number (55560551111056).

Almost surely, 2^{111121102222111} is an apocalyptic number.

111121102222111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121102222111 is an equidigital number, since it uses as much as digits as its factorization.

111121102222111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111121102222111 its reverse (111222201121111), we get a palindrome (222343303343222).

The spelling of 111121102222111 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty-two thousand, one hundred eleven".