21242530324113 has 16 divisors (see below), whose sum is σ = 32369764732800. Its totient is φ = 12138515738496.

The previous prime is 21242530324033. The next prime is 21242530324129. The reversal of 21242530324113 is 31142303524212.

It is a happy number.

It is not a de Polignac number, because 21242530324113 - 2¹⁰ = 21242530323089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21242530324133) 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, 635131 + ... + 6548927.

It is an arithmetic number, because the mean of its divisors is an integer number (2023110295800).

Almost surely, 2^{21242530324113} is an apocalyptic number.

It is an amenable number.

21242530324113 is a deficient number, since it is larger than the sum of its proper divisors (11127234408687).

21242530324113 is a wasteful number, since it uses less digits than its factorization.

21242530324113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6084856.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 21242530324113 its reverse (31142303524212), we get a palindrome (52384833848325).

The spelling of 21242530324113 in words is "twenty-one trillion, two hundred forty-two billion, five hundred thirty million, three hundred twenty-four thousand, one hundred thirteen".