21313320302220 has 192 divisors, whose sum is σ = 63289025243136. Its totient is φ = 5340656988160.

The previous prime is 21313320302207. The next prime is 21313320302293. The reversal of 21313320302220 is 2220302331312.

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, 1942336654 + ... + 1942347626.

It is an arithmetic number, because the mean of its divisors is an integer number (329630339808).

Almost surely, 2^{21313320302220} is an apocalyptic number.

21313320302220 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 21313320302220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31644512621568).

21313320302220 is an abundant number, since it is smaller than the sum of its proper divisors (41975704940916).

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

21313320302220 is a wasteful number, since it uses less digits than its factorization.

21313320302220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13880 (or 13878 counting only the distinct ones).

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

Adding to 21313320302220 its reverse (2220302331312), we get a palindrome (23533622633532).

The spelling of 21313320302220 in words is "twenty-one trillion, three hundred thirteen billion, three hundred twenty million, three hundred two thousand, two hundred twenty".