21002032320103 has 4 divisors (see below), whose sum is σ = 21005743587880. Its totient is φ = 20998321052328.

The previous prime is 21002032320097. The next prime is 21002032320133. The reversal of 21002032320103 is 30102323020012.

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-21002032320103 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 (21002032320133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1855625400 + ... + 1855636717.

It is an arithmetic number, because the mean of its divisors is an integer number (5251435896970).

Almost surely, 2^{21002032320103} is an apocalyptic number.

21002032320103 is a deficient number, since it is larger than the sum of its proper divisors (3711267777).

21002032320103 is an equidigital number, since it uses as much as digits as its factorization.

21002032320103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711267776.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21002032320103 its reverse (30102323020012), we get a palindrome (51104355340115).

The spelling of 21002032320103 in words is "twenty-one trillion, two billion, thirty-two million, three hundred twenty thousand, one hundred three".