21331101020232 has 64 divisors (see below), whose sum is σ = 53536934214720. Its totient is φ = 7082510467328.

The previous prime is 21331101020221. The next prime is 21331101020249. The reversal of 21331101020232 is 23202010113312.

It is a junction number, because it is equal to n+sod(n) for n = 21331101020199 and 21331101020208.

It is an unprimeable number.

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, 8871058 + ... + 11016254.

It is an arithmetic number, because the mean of its divisors is an integer number (836514597105).

Almost surely, 2^{21331101020232} is an apocalyptic number.

It is an amenable number.

21331101020232 is an abundant number, since it is smaller than the sum of its proper divisors (32205833194488).

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

21331101020232 is a wasteful number, since it uses less digits than its factorization.

21331101020232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146830 (or 2146826 counting only the distinct ones).

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

Adding to 21331101020232 its reverse (23202010113312), we get a palindrome (44533111133544).

The spelling of 21331101020232 in words is "twenty-one trillion, three hundred thirty-one billion, one hundred one million, twenty thousand, two hundred thirty-two".