21020321032000 has 112 divisors (see below), whose sum is σ = 53736078090240. Its totient is φ = 8136898368000.

The previous prime is 21020321031889. The next prime is 21020321032001. The reversal of 21020321032000 is 23012302012.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020321032001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42131680 + ... + 42627679.

It is an arithmetic number, because the mean of its divisors is an integer number (479786411520).

Almost surely, 2^{21020321032000} is an apocalyptic number.

21020321032000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020321032000 is an abundant number, since it is smaller than the sum of its proper divisors (32715757058240).

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

21020321032000 is an equidigital number, since it uses as much as digits as its factorization.

21020321032000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84759417 (or 84759397 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21020321032000 its reverse (23012302012), we get a palindrome (21043333334012).

The spelling of 21020321032000 in words is "twenty-one trillion, twenty billion, three hundred twenty-one million, thirty-two thousand".