111111111116111 has 2 divisors, whose sum is σ = 111111111116112. Its totient is φ = 111111111116110.

The previous prime is 111111111116101. The next prime is 111111111116183. The reversal of 111111111116111 is 111611111111111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111111111116111 - 2¹⁴ = 111111111099727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111111116101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555555558055 + 55555555558056.

It is an arithmetic number, because the mean of its divisors is an integer number (55555555558056).

Almost surely, 2^{111111111116111} is an apocalyptic number.

111111111116111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111111116111 is an equidigital number, since it uses as much as digits as its factorization.

111111111116111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6, while the sum is 20.

Adding to 111111111116111 its reverse (111611111111111), we get a palindrome (222722222227222).

The spelling of 111111111116111 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred sixteen thousand, one hundred eleven".