1002001103 has 4 divisors (see below), whose sum is σ = 1011922008. Its totient is φ = 992080200.

The previous prime is 1002001087. The next prime is 1002001123. The reversal of 1002001103 is 3011002001.

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 1002001103 - 2⁴ = 1002001087 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 (1002001123) 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 3 ways as a sum of consecutive naturals, for example, 4960301 + ... + 4960502.

It is an arithmetic number, because the mean of its divisors is an integer number (252980502).

Almost surely, 2^1002001103 is an apocalyptic number.

1002001103 is a deficient number, since it is larger than the sum of its proper divisors (9920905).

1002001103 is an equidigital number, since it uses as much as digits as its factorization.

1002001103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9920904.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1002001103 is about 31654.4010052315. The cubic root of 1002001103 is about 1000.6665898925. Note that the first 3 decimals are identical.

Adding to 1002001103 its reverse (3011002001), we get a palindrome (4013003104).

The spelling of 1002001103 in words is "one billion, two million, one thousand, one hundred three".