21231010300 has 72 divisors (see below), whose sum is σ = 48455148672. Its totient is φ = 8063328000.

The previous prime is 21231010291. The next prime is 21231010309. The reversal of 21231010300 is 301013212.

It is an interprime number because it is at equal distance from previous prime (21231010291) and next prime (21231010309).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231010309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99690 + ... + 228910.

It is an arithmetic number, because the mean of its divisors is an integer number (672988176).

Almost surely, 2^21231010300 is an apocalyptic number.

21231010300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21231010300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24227574336).

21231010300 is an abundant number, since it is smaller than the sum of its proper divisors (27224138372).

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

21231010300 is a wasteful number, since it uses less digits than its factorization.

21231010300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129319 (or 129312 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21231010300 its reverse (301013212), we get a palindrome (21532023512).

The spelling of 21231010300 in words is "twenty-one billion, two hundred thirty-one million, ten thousand, three hundred".