21023231300 has 18 divisors (see below), whose sum is σ = 45620412138. Its totient is φ = 8409292480.

The previous prime is 21023231293. The next prime is 21023231311. The reversal of 21023231300 is 313232012.

It can be written as a sum of positive squares in 3 ways, for example, as 1217172544 + 19806058756 = 34888^2 + 140734^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105116057 + ... + 105116256.

It is an arithmetic number, because the mean of its divisors is an integer number (2534467341).

Almost surely, 2^21023231300 is an apocalyptic number.

21023231300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21023231300 is an abundant number, since it is smaller than the sum of its proper divisors (24597180838).

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

21023231300 is a wasteful number, since it uses less digits than its factorization.

21023231300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210232327 (or 210232320 counting only the distinct ones).

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

Adding to 21023231300 its reverse (313232012), we get a palindrome (21336463312).

The spelling of 21023231300 in words is "twenty-one billion, twenty-three million, two hundred thirty-one thousand, three hundred".