21250560103513 has 16 divisors (see below), whose sum is σ = 23624076736512. Its totient is φ = 18982628136000.

The previous prime is 21250560103481. The next prime is 21250560103517. The reversal of 21250560103513 is 31530106505212.

It is a cyclic number.

It is not a de Polignac number, because 21250560103513 - 2⁵ = 21250560103481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21250560103517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14982528 + ... + 16339438.

It is an arithmetic number, because the mean of its divisors is an integer number (1476504796032).

Almost surely, 2^{21250560103513} is an apocalyptic number.

It is an amenable number.

21250560103513 is a deficient number, since it is larger than the sum of its proper divisors (2373516632999).

21250560103513 is a wasteful number, since it uses less digits than its factorization.

21250560103513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395816.

The product of its (nonzero) digits is 27000, while the sum is 34.

Adding to 21250560103513 its reverse (31530106505212), we get a palindrome (52780666608725).

The spelling of 21250560103513 in words is "twenty-one trillion, two hundred fifty billion, five hundred sixty million, one hundred three thousand, five hundred thirteen".