21002002223203 has 8 divisors (see below), whose sum is σ = 21024843840000. Its totient is φ = 20979164983368.

The previous prime is 21002002223161. The next prime is 21002002223207. The reversal of 21002002223203 is 30232220020012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002002223203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002002223207) 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, 8553798 + ... + 10731796.

It is an arithmetic number, because the mean of its divisors is an integer number (2628105480000).

Almost surely, 2^{21002002223203} is an apocalyptic number.

21002002223203 is a deficient number, since it is larger than the sum of its proper divisors (22841616797).

21002002223203 is a wasteful number, since it uses less digits than its factorization.

21002002223203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188481.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21002002223203 its reverse (30232220020012), we get a palindrome (51234222243215).

The spelling of 21002002223203 in words is "twenty-one trillion, two billion, two million, two hundred twenty-three thousand, two hundred three".