1000001011003 has 4 divisors (see below), whose sum is σ = 1001518463880. Its totient is φ = 998483558128.

The previous prime is 1000001010989. The next prime is 1000001011013. The reversal of 1000001011003 is 3001101000001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1000001011003 - 2¹³ = 1000001002811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000001011013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758725450 + ... + 758726767.

It is an arithmetic number, because the mean of its divisors is an integer number (250379615970).

Almost surely, 2^{1000001011003} is an apocalyptic number.

1000001011003 is a deficient number, since it is larger than the sum of its proper divisors (1517452877).

1000001011003 is an equidigital number, since it uses as much as digits as its factorization.

1000001011003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517452876.

The product of its (nonzero) digits is 3, while the sum is 7.

Adding to 1000001011003 its reverse (3001101000001), we get a palindrome (4001102011004).

The spelling of 1000001011003 in words is "one trillion, one million, eleven thousand, three".