1100111110081 has 4 divisors (see below), whose sum is σ = 1104082630612. Its totient is φ = 1096139589552.

The previous prime is 1100111110073. The next prime is 1100111110099. The reversal of 1100111110081 is 1800111110011.

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

It can be written as a sum of positive squares in 2 ways, for example, as 255211884225 + 844899225856 = 505185^2 + 919184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100111110081 - 2³ = 1100111110073 is a prime.

It is a super-2 number, since 2×1100111110081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100111110051) 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, 1985759850 + ... + 1985760403.

It is an arithmetic number, because the mean of its divisors is an integer number (276020657653).

Almost surely, 2^{1100111110081} is an apocalyptic number.

It is an amenable number.

1100111110081 is a deficient number, since it is larger than the sum of its proper divisors (3971520531).

1100111110081 is an equidigital number, since it uses as much as digits as its factorization.

1100111110081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971520530.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 1100111110081 its reverse (1800111110011), we get a palindrome (2900222220092).

The spelling of 1100111110081 in words is "one trillion, one hundred billion, one hundred eleven million, one hundred ten thousand, eighty-one".