21232103221020 has 192 divisors, whose sum is σ = 61765323984000. Its totient is φ = 5443107532800.

The previous prime is 21232103220997. The next prime is 21232103221037. The reversal of 21232103221020 is 2012230123212.

It is a congruent number.

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, 425664322 + ... + 425714198.

It is an arithmetic number, because the mean of its divisors is an integer number (321694395750).

Almost surely, 2^{21232103221020} is an apocalyptic number.

21232103221020 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 21232103221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30882661992000).

21232103221020 is an abundant number, since it is smaller than the sum of its proper divisors (40533220762980).

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

21232103221020 is a wasteful number, since it uses less digits than its factorization.

21232103221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50968 (or 50966 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21232103221020 its reverse (2012230123212), we get a palindrome (23244333344232).

The spelling of 21232103221020 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred three million, two hundred twenty-one thousand, twenty".