21003311203 has 8 divisors (see below), whose sum is σ = 24589242720. Its totient is φ = 17563744320.

The previous prime is 21003311201. The next prime is 21003311207. The reversal of 21003311203 is 30211330012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21003311203 - 2¹ = 21003311201 is a prime.

It is a super-2 number, since 2×21003311203² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21003311201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36590848 + ... + 36591421.

It is an arithmetic number, because the mean of its divisors is an integer number (3073655340).

Almost surely, 2^21003311203 is an apocalyptic number.

21003311203 is a deficient number, since it is larger than the sum of its proper divisors (3585931517).

21003311203 is an equidigital number, since it uses as much as digits as its factorization.

21003311203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73182317.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21003311203 its reverse (30211330012), we get a palindrome (51214641215).

The spelling of 21003311203 in words is "twenty-one billion, three million, three hundred eleven thousand, two hundred three".