21123335013524 has 48 divisors (see below), whose sum is σ = 38932183180800. Its totient is φ = 10000449367776.

The previous prime is 21123335013523. The next prime is 21123335013551. The reversal of 21123335013524 is 42531053332112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123335013523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1593125207 + ... + 1593138465.

It is an arithmetic number, because the mean of its divisors is an integer number (811087149600).

Almost surely, 2^{21123335013524} is an apocalyptic number.

It is an amenable number.

21123335013524 is a deficient number, since it is larger than the sum of its proper divisors (17808848167276).

21123335013524 is a wasteful number, since it uses less digits than its factorization.

21123335013524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22892 (or 22890 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 21123335013524 its reverse (42531053332112), we get a palindrome (63654388345636).

The spelling of 21123335013524 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred thirty-five million, thirteen thousand, five hundred twenty-four".