21000203321300 has 72 divisors (see below), whose sum is σ = 52793935930176. Its totient is φ = 7101438600960.

The previous prime is 21000203321249. The next prime is 21000203321333. The reversal of 21000203321300 is 312330200012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205430342 + ... + 205532541.

Almost surely, 2^{21000203321300} is an apocalyptic number.

21000203321300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21000203321300 is an abundant number, since it is smaller than the sum of its proper divisors (31793732608876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21000203321300 is a wasteful number, since it uses less digits than its factorization.

21000203321300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410962977 (or 410962970 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21000203321300 its reverse (312330200012), we get a palindrome (21312533521312).

The spelling of 21000203321300 in words is "twenty-one trillion, two hundred three million, three hundred twenty-one thousand, three hundred".