21530122511504 has 20 divisors (see below), whose sum is σ = 42337218522864. Its totient is φ = 10604388699168.

The previous prime is 21530122511501. The next prime is 21530122511533. The reversal of 21530122511504 is 40511522103512.

It is a super-3 number, since 3×21530122511504³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21530122511501) 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 3 ways as a sum of consecutive naturals, for example, 10042033682 + ... + 10042035825.

Almost surely, 2^{21530122511504} is an apocalyptic number.

It is an amenable number.

21530122511504 is a deficient number, since it is larger than the sum of its proper divisors (20807096011360).

21530122511504 is a wasteful number, since it uses less digits than its factorization.

21530122511504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20084069582 (or 20084069576 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 21530122511504 in words is "twenty-one trillion, five hundred thirty billion, one hundred twenty-two million, five hundred eleven thousand, five hundred four".