21332003121 has 48 divisors (see below), whose sum is σ = 38329200000. Its totient is φ = 11231976960.

The previous prime is 21332003117. The next prime is 21332003141. The reversal of 21332003121 is 12130023312.

21332003121 is a `hidden beast` number, since 21 + 332 + 0 + 0 + 312 + 1 = 666.

It is not a de Polignac number, because 21332003121 - 2² = 21332003117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21332003094 and 21332003103.

It is not an unprimeable number, because it can be changed into a prime (21332003111) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 465621 + ... + 509378.

It is an arithmetic number, because the mean of its divisors is an integer number (798525000).

Almost surely, 2^21332003121 is an apocalyptic number.

It is an amenable number.

21332003121 is a deficient number, since it is larger than the sum of its proper divisors (16997196879).

21332003121 is a wasteful number, since it uses less digits than its factorization.

21332003121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975046 (or 975043 counting only the distinct ones).

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

Adding to 21332003121 its reverse (12130023312), we get a palindrome (33462026433).

The spelling of 21332003121 in words is "twenty-one billion, three hundred thirty-two million, three thousand, one hundred twenty-one".