21002002223204 has 48 divisors (see below), whose sum is σ = 38766401888256. Its totient is φ = 9940884813600.

The previous prime is 21002002223161. The next prime is 21002002223207. The reversal of 21002002223204 is 40232220020012.

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 15 ways as a sum of consecutive naturals, for example, 10320767 + ... + 12186969.

It is an arithmetic number, because the mean of its divisors is an integer number (807633372672).

Almost surely, 2^{21002002223204} is an apocalyptic number.

It is an amenable number.

21002002223204 is a deficient number, since it is larger than the sum of its proper divisors (17764399665052).

21002002223204 is a wasteful number, since it uses less digits than its factorization.

21002002223204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868216 (or 1868214 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21002002223204 its reverse (40232220020012), we get a palindrome (61234222243216).

The spelling of 21002002223204 in words is "twenty-one trillion, two billion, two million, two hundred twenty-three thousand, two hundred four".