2021003101003 has 4 divisors (see below), whose sum is σ = 2021075258760. Its totient is φ = 2020930943248.

The previous prime is 2021003100983. The next prime is 2021003101027. The reversal of 2021003101003 is 3001013001202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021003101003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021003101303) 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, 36036850 + ... + 36092887.

It is an arithmetic number, because the mean of its divisors is an integer number (505268814690).

Almost surely, 2^{2021003101003} is an apocalyptic number.

2021003101003 is a deficient number, since it is larger than the sum of its proper divisors (72157757).

2021003101003 is an equidigital number, since it uses as much as digits as its factorization.

2021003101003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72157756.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 2021003101003 its reverse (3001013001202), we get a palindrome (5022016102205).

The spelling of 2021003101003 in words is "two trillion, twenty-one billion, three million, one hundred one thousand, three".