11001012003 has 40 divisors (see below), whose sum is σ = 16703498240. Its totient is φ = 7213892400.

The previous prime is 11001011993. The next prime is 11001012031. The reversal of 11001012003 is 30021010011.

It is not a de Polignac number, because 11001012003 - 2²¹ = 10998914851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11001012083) 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 39 ways as a sum of consecutive naturals, for example, 5637678 + ... + 5639628.

It is an arithmetic number, because the mean of its divisors is an integer number (417587456).

Almost surely, 2^11001012003 is an apocalyptic number.

11001012003 is a deficient number, since it is larger than the sum of its proper divisors (5702486237).

11001012003 is a wasteful number, since it uses less digits than its factorization.

11001012003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069 (or 3060 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 11001012003 its reverse (30021010011), we get a palindrome (41022022014).

The spelling of 11001012003 in words is "eleven billion, one million, twelve thousand, three".