21224535005215 has 16 divisors (see below), whose sum is σ = 25758621187200. Its totient is φ = 16787514788352.

The previous prime is 21224535005207. The next prime is 21224535005221. The reversal of 21224535005215 is 51250053542212.

It is a cyclic number.

It is not a de Polignac number, because 21224535005215 - 2³ = 21224535005207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41803930 + ... + 42308599.

It is an arithmetic number, because the mean of its divisors is an integer number (1609913824200).

Almost surely, 2^{21224535005215} is an apocalyptic number.

21224535005215 is a deficient number, since it is larger than the sum of its proper divisors (4534086181985).

21224535005215 is a wasteful number, since it uses less digits than its factorization.

21224535005215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84113106.

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 21224535005215 its reverse (51250053542212), we get a palindrome (72474588547427).

The spelling of 21224535005215 in words is "twenty-one trillion, two hundred twenty-four billion, five hundred thirty-five million, five thousand, two hundred fifteen".