21332103021 has 12 divisors (see below), whose sum is σ = 30814868448. Its totient is φ = 14220557064.

The previous prime is 21332102993. The next prime is 21332103031. The reversal of 21332103021 is 12030123312.

21332103021 is a `hidden beast` number, since 21 + 332 + 10 + 302 + 1 = 666.

It is not a de Polignac number, because 21332103021 - 2¹³ = 21332094829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21332102985 and 21332103003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332103031) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 115246 + ... + 236528.

It is an arithmetic number, because the mean of its divisors is an integer number (2567905704).

Almost surely, 2^21332103021 is an apocalyptic number.

It is an amenable number.

21332103021 is a deficient number, since it is larger than the sum of its proper divisors (9482765427).

21332103021 is a wasteful number, since it uses less digits than its factorization.

21332103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140832 (or 140829 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21332103021 its reverse (12030123312), we get a palindrome (33362226333).

The spelling of 21332103021 in words is "twenty-one billion, three hundred thirty-two million, one hundred three thousand, twenty-one".