21220320003 has 4 divisors (see below), whose sum is σ = 28293760008. Its totient is φ = 14146880000.

The previous prime is 21220320001. The next prime is 21220320049. The reversal of 21220320003 is 30002302212.

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 21220320003 - 2¹ = 21220320001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220320001) 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, 3536719998 + ... + 3536720003.

It is an arithmetic number, because the mean of its divisors is an integer number (7073440002).

Almost surely, 2^21220320003 is an apocalyptic number.

21220320003 is a deficient number, since it is larger than the sum of its proper divisors (7073440005).

21220320003 is an equidigital number, since it uses as much as digits as its factorization.

21220320003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7073440004.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21220320003 its reverse (30002302212), we get a palindrome (51222622215).

The spelling of 21220320003 in words is "twenty-one billion, two hundred twenty million, three hundred twenty thousand, three".