21321231202302 has 64 divisors (see below), whose sum is σ = 44551629504000. Its totient is φ = 6789652835328.

The previous prime is 21321231202289. The next prime is 21321231202303. The reversal of 21321231202302 is 20320213212312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321231202303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 470343574 + ... + 470388902.

It is an arithmetic number, because the mean of its divisors is an integer number (696119211000).

Almost surely, 2^{21321231202302} is an apocalyptic number.

21321231202302 is an abundant number, since it is smaller than the sum of its proper divisors (23230398301698).

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

21321231202302 is a wasteful number, since it uses less digits than its factorization.

21321231202302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49505.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21321231202302 its reverse (20320213212312), we get a palindrome (41641444414614).

The spelling of 21321231202302 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred thirty-one million, two hundred two thousand, three hundred two".