1001000001103 has 4 divisors (see below), whose sum is σ = 1001012537448. Its totient is φ = 1000987464760.

The previous prime is 1001000001073. The next prime is 1001000001107. The reversal of 1001000001103 is 3011000001001.

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 1001000001103 - 2²¹ = 1000997903951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001000001107) 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, 6147628 + ... + 6308353.

It is an arithmetic number, because the mean of its divisors is an integer number (250253134362).

Almost surely, 2^{1001000001103} is an apocalyptic number.

1001000001103 is a deficient number, since it is larger than the sum of its proper divisors (12536345).

1001000001103 is an equidigital number, since it uses as much as digits as its factorization.

1001000001103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12536344.

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

Adding to 1001000001103 its reverse (3011000001001), we get a palindrome (4012000002104).

The spelling of 1001000001103 in words is "one trillion, one billion, one thousand, one hundred three".