1100000009903 has 2 divisors, whose sum is σ = 1100000009904. Its totient is φ = 1100000009902.

The previous prime is 1100000009893. The next prime is 1100000010029. The reversal of 1100000009903 is 3099000000011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1100000009903 - 2¹⁰ = 1100000008879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100000009203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550000004951 + 550000004952.

It is an arithmetic number, because the mean of its divisors is an integer number (550000004952).

Almost surely, 2^{1100000009903} is an apocalyptic number.

1100000009903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100000009903 is an equidigital number, since it uses as much as digits as its factorization.

1100000009903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 23.

Adding to 1100000009903 its reverse (3099000000011), we get a palindrome (4199000009914).

The spelling of 1100000009903 in words is "one trillion, one hundred billion, nine thousand, nine hundred three".