21232331101020 has 192 divisors, whose sum is σ = 67421632320000. Its totient is φ = 4949264415744.

The previous prime is 21232331100979. The next prime is 21232331101031. The reversal of 21232331101020 is 2010113323212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35105131 + ... + 35704829.

It is an arithmetic number, because the mean of its divisors is an integer number (351154335000).

Almost surely, 2^{21232331101020} is an apocalyptic number.

21232331101020 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 21232331101020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33710816160000).

21232331101020 is an abundant number, since it is smaller than the sum of its proper divisors (46189301218980).

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

21232331101020 is a wasteful number, since it uses less digits than its factorization.

21232331101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602132 (or 602130 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21232331101020 its reverse (2010113323212), we get a palindrome (23242444424232).

The spelling of 21232331101020 in words is "twenty-one trillion, two hundred thirty-two billion, three hundred thirty-one million, one hundred one thousand, twenty".