21001331032 has 16 divisors (see below), whose sum is σ = 42957268200. Its totient is φ = 9546059520.

The previous prime is 21001330969. The next prime is 21001331033. The reversal of 21001331032 is 23013310012.

It is a junction number, because it is equal to n+sod(n) for n = 21001330997 and 21001331015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001331033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119325657 + ... + 119325832.

Almost surely, 2^21001331032 is an apocalyptic number.

21001331032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21001331032 is an abundant number, since it is smaller than the sum of its proper divisors (21955937168).

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

21001331032 is a wasteful number, since it uses less digits than its factorization.

21001331032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238651506 (or 238651502 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21001331032 its reverse (23013310012), we get a palindrome (44014641044).

The spelling of 21001331032 in words is "twenty-one billion, one million, three hundred thirty-one thousand, thirty-two".