21230210000 has 200 divisors, whose sum is σ = 53702515944. Its totient is φ = 8120320000.

The previous prime is 21230209993. The next prime is 21230210017. The reversal of 21230210000 is 1203212.

It is a happy number.

It can be written as a sum of positive squares in 20 ways, for example, as 20345028496 + 885181504 = 142636^2 + 29752^2 .

It is a tau number, because it is divible by the number of its divisors (200).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21729512 + ... + 21730488.

Almost surely, 2^21230210000 is an apocalyptic number.

21230210000 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 21230210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26851257972).

21230210000 is an abundant number, since it is smaller than the sum of its proper divisors (32472305944).

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

21230210000 is an equidigital number, since it uses as much as digits as its factorization.

21230210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21230210000 its reverse (1203212), we get a palindrome (21231413212).

The spelling of 21230210000 in words is "twenty-one billion, two hundred thirty million, two hundred ten thousand".