1100111009903 has 2 divisors, whose sum is σ = 1100111009904. Its totient is φ = 1100111009902.

The previous prime is 1100111009869. The next prime is 1100111009909. The reversal of 1100111009903 is 3099001110011.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1100111009903 - 2¹⁴ = 1100110993519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100111009909) 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 as a sum of consecutive naturals, namely, 550055504951 + 550055504952.

It is an arithmetic number, because the mean of its divisors is an integer number (550055504952).

Almost surely, 2^{1100111009903} is an apocalyptic number.

1100111009903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100111009903 is an equidigital number, since it uses as much as digits as its factorization.

1100111009903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 26.

Adding to 1100111009903 its reverse (3099001110011), we get a palindrome (4199112119914).

The spelling of 1100111009903 in words is "one trillion, one hundred billion, one hundred eleven million, nine thousand, nine hundred three".