21002002203203 has 8 divisors (see below), whose sum is σ = 24003874652160. Its totient is φ = 18000526359240.

The previous prime is 21002002203157. The next prime is 21002002203223. The reversal of 21002002203203 is 30230220020012.

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 21002002203203 - 2⁶ = 21002002203139 is a prime.

It is a super-2 number, since 2×21002002203203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002002203223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99037763 + ... + 99249596.

It is an arithmetic number, because the mean of its divisors is an integer number (3000484331520).

Almost surely, 2^{21002002203203} is an apocalyptic number.

21002002203203 is a deficient number, since it is larger than the sum of its proper divisors (3001872448957).

21002002203203 is a wasteful number, since it uses less digits than its factorization.

21002002203203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198302497.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21002002203203 its reverse (30230220020012), we get a palindrome (51232222223215).

The spelling of 21002002203203 in words is "twenty-one trillion, two billion, two million, two hundred three thousand, two hundred three".