21202311300 has 72 divisors (see below), whose sum is σ = 61360260192. Its totient is φ = 5652576000.

The previous prime is 21202311233. The next prime is 21202311323. The reversal of 21202311300 is 311320212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21202311300.

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, 2047135 + ... + 2057465.

It is an arithmetic number, because the mean of its divisors is an integer number (852225836).

Almost surely, 2^21202311300 is an apocalyptic number.

21202311300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202311300 is an abundant number, since it is smaller than the sum of its proper divisors (40157948892).

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

21202311300 is a wasteful number, since it uses less digits than its factorization.

21202311300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17189 (or 17182 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21202311300 its reverse (311320212), we get a palindrome (21513631512).

The spelling of 21202311300 in words is "twenty-one billion, two hundred two million, three hundred eleven thousand, three hundred".