21130223203320 has 256 divisors, whose sum is σ = 79190922240000. Its totient is φ = 4381895784960.

The previous prime is 21130223203301. The next prime is 21130223203321. The reversal of 21130223203320 is 2330232203112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130223203321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2319357 + ... + 6902163.

It is an arithmetic number, because the mean of its divisors is an integer number (309339540000).

Almost surely, 2^{21130223203320} is an apocalyptic number.

21130223203320 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 21130223203320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39595461120000).

21130223203320 is an abundant number, since it is smaller than the sum of its proper divisors (58060699036680).

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

21130223203320 is a wasteful number, since it uses less digits than its factorization.

21130223203320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583338 (or 4583334 counting only the distinct ones).

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

Adding to 21130223203320 its reverse (2330232203112), we get a palindrome (23460455406432).

The spelling of 21130223203320 in words is "twenty-one trillion, one hundred thirty billion, two hundred twenty-three million, two hundred three thousand, three hundred twenty".