21233243130 has 128 divisors (see below), whose sum is σ = 56472422400. Its totient is φ = 5066592000.

The previous prime is 21233243123. The next prime is 21233243149. The reversal of 21233243130 is 3134233212.

It is a super-2 number, since 2×21233243130² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21233243130.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5964291 + ... + 5967849.

It is an arithmetic number, because the mean of its divisors is an integer number (441190800).

Almost surely, 2^21233243130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21233243130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28236211200).

21233243130 is an abundant number, since it is smaller than the sum of its proper divisors (35239179270).

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

21233243130 is a wasteful number, since it uses less digits than its factorization.

21233243130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3860.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21233243130 its reverse (3134233212), we get a palindrome (24367476342).

The spelling of 21233243130 in words is "twenty-one billion, two hundred thirty-three million, two hundred forty-three thousand, one hundred thirty".