1100111111111 has 4 divisors (see below), whose sum is σ = 1101534282792. Its totient is φ = 1098687939432.

The previous prime is 1100111111081. The next prime is 1100111111159. The reversal of 1100111111111 is 1111111110011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100111111111 is a prime.

It is a Duffinian number.

1100111111111 is a modest number, since divided by 1111111 gives 110011 as remainder.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 1100111111092 and 1100111111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100111119111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711584681 + ... + 711586226.

It is an arithmetic number, because the mean of its divisors is an integer number (275383570698).

Almost surely, 2^{1100111111111} is an apocalyptic number.

1100111111111 is a deficient number, since it is larger than the sum of its proper divisors (1423171681).

1100111111111 is an equidigital number, since it uses as much as digits as its factorization.

1100111111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423171680.

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

Adding to 1100111111111 its reverse (1111111110011), we get a palindrome (2211222221122).

It can be divided in two parts, 110011 and 1111111, that multiplied together give a palindrome (122234432221).

The spelling of 1100111111111 in words is "one trillion, one hundred billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".