21021124300 has 108 divisors (see below), whose sum is σ = 50245846560. Its totient is φ = 7627875200.

The previous prime is 21021124277. The next prime is 21021124301. The reversal of 21021124300 is 342112012.

It is not an unprimeable number, because it can be changed into a prime (21021124301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6738141 + ... + 6741259.

It is an arithmetic number, because the mean of its divisors is an integer number (465239320).

Almost surely, 2^21021124300 is an apocalyptic number.

21021124300 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 21021124300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25122923280).

21021124300 is an abundant number, since it is smaller than the sum of its proper divisors (29224722260).

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

21021124300 is a wasteful number, since it uses less digits than its factorization.

21021124300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712 (or 3694 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21021124300 its reverse (342112012), we get a palindrome (21363236312).

The spelling of 21021124300 in words is "twenty-one billion, twenty-one million, one hundred twenty-four thousand, three hundred".