1111111100111 has 2 divisors, whose sum is σ = 1111111100112. Its totient is φ = 1111111100110.

The previous prime is 1111111100069. The next prime is 1111111100129. The reversal of 1111111100111 is 1110011111111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111111100111 - 2²² = 1111106905807 is a prime.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 1111111100092 and 1111111100101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111111100171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555555550055 + 555555550056.

It is an arithmetic number, because the mean of its divisors is an integer number (555555550056).

Almost surely, 2^{1111111100111} is an apocalyptic number.

1111111100111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111111100111 is an equidigital number, since it uses as much as digits as its factorization.

1111111100111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1, while the sum is 11.

Adding to 1111111100111 its reverse (1110011111111), we get a palindrome (2221122211222).

It can be divided in two parts, 11111 and 11100111, that multiplied together give a palindrome (123333333321).

The spelling of 1111111100111 in words is "one trillion, one hundred eleven billion, one hundred eleven million, one hundred thousand, one hundred eleven".