21010424403213 has 24 divisors (see below), whose sum is σ = 34697048238528. Its totient is φ = 12001396905792.

The previous prime is 21010424403211. The next prime is 21010424403223. The reversal of 21010424403213 is 31230442401012.

21010424403213 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 0 + 4 + 2 + 440 + 3 + 213 = 666.

It is not a de Polignac number, because 21010424403213 - 2¹ = 21010424403211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010424403211) 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 23 ways as a sum of consecutive naturals, for example, 63164695 + ... + 63496452.

It is an arithmetic number, because the mean of its divisors is an integer number (1445710343272).

Almost surely, 2^{21010424403213} is an apocalyptic number.

It is an amenable number.

21010424403213 is a deficient number, since it is larger than the sum of its proper divisors (13686623835315).

21010424403213 is a wasteful number, since it uses less digits than its factorization.

21010424403213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126663793 (or 126663790 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21010424403213 its reverse (31230442401012), we get a palindrome (52240866804225).

The spelling of 21010424403213 in words is "twenty-one trillion, ten billion, four hundred twenty-four million, four hundred three thousand, two hundred thirteen".