1111111108111 has 2 divisors, whose sum is σ = 1111111108112. Its totient is φ = 1111111108110.

The previous prime is 1111111108087. The next prime is 1111111108127. The reversal of 1111111108111 is 1118011111111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111111108111 - 2²⁷ = 1110976890383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111111100111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555555554055 + 555555554056.

It is an arithmetic number, because the mean of its divisors is an integer number (555555554056).

Almost surely, 2^{1111111108111} is an apocalyptic number.

1111111108111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111111108111 is an equidigital number, since it uses as much as digits as its factorization.

1111111108111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 19.

Adding to 1111111108111 its reverse (1118011111111), we get a palindrome (2229122219222).

It can be divided in two parts, 111111 and 1108111, that multiplied together give a palindrome (123123321321).

The spelling of 1111111108111 in words is "one trillion, one hundred eleven billion, one hundred eleven million, one hundred eight thousand, one hundred eleven".