21233210000 has 100 divisors (see below), whose sum is σ = 51533113500. Its totient is φ = 8472576000.

The previous prime is 21233209993. The next prime is 21233210003. The reversal of 21233210000 is 1233212.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 20063022736 + 1170187264 = 141644^2 + 34208^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is not an unprimeable number, because it can be changed into a prime (21233210003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4487636 + ... + 4492364.

It is an arithmetic number, because the mean of its divisors is an integer number (515331135).

Almost surely, 2^21233210000 is an apocalyptic number.

21233210000 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 21233210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25766556750).

21233210000 is an abundant number, since it is smaller than the sum of its proper divisors (30299903500).

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

21233210000 is an equidigital number, since it uses as much as digits as its factorization.

21233210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206 (or 5185 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21233210000 its reverse (1233212), we get a palindrome (21234443212).

It can be divided in two parts, 2123 and 3210000, that added together give a palindrome (3212123).

The spelling of 21233210000 in words is "twenty-one billion, two hundred thirty-three million, two hundred ten thousand".