21222014520015 has 48 divisors (see below), whose sum is σ = 39152558255616. Its totient is φ = 10596846105600.

The previous prime is 21222014520013. The next prime is 21222014520053. The reversal of 21222014520015 is 51002541022212.

21222014520015 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 201 + 452 + 0 + 0 + 1 + 5 = 666.

It is not a de Polignac number, because 21222014520015 - 2¹ = 21222014520013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222014520013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72474816 + ... + 72767045.

It is an arithmetic number, because the mean of its divisors is an integer number (815678296992).

Almost surely, 2^{21222014520015} is an apocalyptic number.

21222014520015 is a deficient number, since it is larger than the sum of its proper divisors (17930543735601).

21222014520015 is a wasteful number, since it uses less digits than its factorization.

21222014520015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145242080 (or 145242077 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 21222014520015 its reverse (51002541022212), we get a palindrome (72224555542227).

The spelling of 21222014520015 in words is "twenty-one trillion, two hundred twenty-two billion, fourteen million, five hundred twenty thousand, fifteen".