21303231100 has 18 divisors (see below), whose sum is σ = 46228011704. Its totient is φ = 8521292400.

The previous prime is 21303231013. The next prime is 21303231127. The reversal of 21303231100 is 113230312.

It is a congruent number.

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, 106516056 + ... + 106516255.

Almost surely, 2^21303231100 is an apocalyptic number.

21303231100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21303231100 is an abundant number, since it is smaller than the sum of its proper divisors (24924780604).

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

21303231100 is a wasteful number, since it uses less digits than its factorization.

21303231100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213032325 (or 213032318 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21303231100 its reverse (113230312), we get a palindrome (21416461412).

The spelling of 21303231100 in words is "twenty-one billion, three hundred three million, two hundred thirty-one thousand, one hundred".