21331023203 has 8 divisors (see below), whose sum is σ = 24428374272. Its totient is φ = 18246187656.

The previous prime is 21331023191. The next prime is 21331023209. The reversal of 21331023203 is 30232013312.

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 21331023203 - 2¹⁰ = 21331022179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21331023209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3125225 + ... + 3132042.

It is an arithmetic number, because the mean of its divisors is an integer number (3053546784).

Almost surely, 2^21331023203 is an apocalyptic number.

21331023203 is a deficient number, since it is larger than the sum of its proper divisors (3097351069).

21331023203 is an equidigital number, since it uses as much as digits as its factorization.

21331023203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6257761.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21331023203 its reverse (30232013312), we get a palindrome (51563036515).

The spelling of 21331023203 in words is "twenty-one billion, three hundred thirty-one million, twenty-three thousand, two hundred three".