10111222111 has 2 divisors, whose sum is σ = 10111222112. Its totient is φ = 10111222110.

The previous prime is 10111222063. The next prime is 10111222123. The reversal of 10111222111 is 11122211101.

It is a happy number.

10111222111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (11122211101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10111222111 - 2⁹ = 10111221599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10111222091 and 10111222100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111222171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055611055 + 5055611056.

It is an arithmetic number, because the mean of its divisors is an integer number (5055611056).

Almost surely, 2^10111222111 is an apocalyptic number.

10111222111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111222111 is an equidigital number, since it uses as much as digits as its factorization.

10111222111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10111222111 its reverse (11122211101), we get a palindrome (21233433212).

The spelling of 10111222111 in words is "ten billion, one hundred eleven million, two hundred twenty-two thousand, one hundred eleven".