111111100012111 has 2 divisors, whose sum is σ = 111111100012112. Its totient is φ = 111111100012110.

The previous prime is 111111100012093. The next prime is 111111100012219. The reversal of 111111100012111 is 111210001111111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111111100012111 - 2⁹ = 111111100011599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111111100012091 and 111111100012100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111106012111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555550006055 + 55555550006056.

It is an arithmetic number, because the mean of its divisors is an integer number (55555550006056).

Almost surely, 2^{111111100012111} is an apocalyptic number.

111111100012111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111100012111 is an equidigital number, since it uses as much as digits as its factorization.

111111100012111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 111111100012111 its reverse (111210001111111), we get a palindrome (222321101123222).

The spelling of 111111100012111 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred million, twelve thousand, one hundred eleven".