21513530511012 has 48 divisors (see below), whose sum is σ = 50283726796352. Its totient is φ = 7158965068800.

The previous prime is 21513530510957. The next prime is 21513530511017. The reversal of 21513530511012 is 21011503531512.

It is not an unprimeable number, because it can be changed into a prime (21513530511017) 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, 273749868 + ... + 273828444.

Almost surely, 2^{21513530511012} is an apocalyptic number.

It is an amenable number.

21513530511012 is an abundant number, since it is smaller than the sum of its proper divisors (28770196285340).

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

21513530511012 is a wasteful number, since it uses less digits than its factorization.

21513530511012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117148 (or 117146 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 21513530511012 in words is "twenty-one trillion, five hundred thirteen billion, five hundred thirty million, five hundred eleven thousand, twelve".