2001105503 has 2 divisors, whose sum is σ = 2001105504. Its totient is φ = 2001105502.

The previous prime is 2001105499. The next prime is 2001105529. The reversal of 2001105503 is 3055011002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001105503 - 2² = 2001105499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001105563) 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, 1000552751 + 1000552752.

It is an arithmetic number, because the mean of its divisors is an integer number (1000552752).

Almost surely, 2^2001105503 is an apocalyptic number.

2001105503 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001105503 is an equidigital number, since it uses as much as digits as its factorization.

2001105503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 2001105503 is about 44733.7177417661. The cubic root of 2001105503 is about 1260.1531482193.

Adding to 2001105503 its reverse (3055011002), we get a palindrome (5056116505).

The spelling of 2001105503 in words is "two billion, one million, one hundred five thousand, five hundred three".