21033212303320 has 144 divisors (see below), whose sum is σ = 55423279401840. Its totient is φ = 7162973685504.

The previous prime is 21033212303273. The next prime is 21033212303381. The reversal of 21033212303320 is 2330321233012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 43272277 + ... + 43755643.

It is an arithmetic number, because the mean of its divisors is an integer number (384883884735).

Almost surely, 2^{21033212303320} is an apocalyptic number.

21033212303320 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 21033212303320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27711639700920).

21033212303320 is an abundant number, since it is smaller than the sum of its proper divisors (34390067098520).

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

21033212303320 is a wasteful number, since it uses less digits than its factorization.

21033212303320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483690 (or 483530 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21033212303320 its reverse (2330321233012), we get a palindrome (23363533536332).

The spelling of 21033212303320 in words is "twenty-one trillion, thirty-three billion, two hundred twelve million, three hundred three thousand, three hundred twenty".