21303001010003 has 4 divisors (see below), whose sum is σ = 21303016673328. Its totient is φ = 21302985346680.

The previous prime is 21303001009957. The next prime is 21303001010017. The reversal of 21303001010003 is 30001010030312.

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 21303001010003 - 2⁸ = 21303001009747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21303001010003.

It is not an unprimeable number, because it can be changed into a prime (21303001010303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5574788 + ... + 8583953.

It is an arithmetic number, because the mean of its divisors is an integer number (5325754168332).

Almost surely, 2^{21303001010003} is an apocalyptic number.

21303001010003 is a deficient number, since it is larger than the sum of its proper divisors (15663325).

21303001010003 is a wasteful number, since it uses less digits than its factorization.

21303001010003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15663324.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 21303001010003 its reverse (30001010030312), we get a palindrome (51304011040315).

The spelling of 21303001010003 in words is "twenty-one trillion, three hundred three billion, one million, ten thousand, three".