1103055919991 has 4 divisors (see below), whose sum is σ = 1103103820800. Its totient is φ = 1103008019184.

The previous prime is 1103055919939. The next prime is 1103055920077. The reversal of 1103055919991 is 1999195503011.

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-1103055919991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103055019991) 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, 23915846 + ... + 23961923.

It is an arithmetic number, because the mean of its divisors is an integer number (275775955200).

Almost surely, 2^{1103055919991} is an apocalyptic number.

1103055919991 is a deficient number, since it is larger than the sum of its proper divisors (47900809).

1103055919991 is an equidigital number, since it uses as much as digits as its factorization.

1103055919991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47900808.

The product of its (nonzero) digits is 492075, while the sum is 53.

The spelling of 1103055919991 in words is "one trillion, one hundred three billion, fifty-five million, nine hundred nineteen thousand, nine hundred ninety-one".