21424241422215 has 64 divisors (see below), whose sum is σ = 38460344832000. Its totient is φ = 11314438186752.

The previous prime is 21424241422211. The next prime is 21424241422223. The reversal of 21424241422215 is 51222414242412.

21424241422215 is a `hidden beast` number, since 2 + 1 + 4 + 2 + 4 + 2 + 414 + 22 + 215 = 666.

It is not a de Polignac number, because 21424241422215 - 2² = 21424241422211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21424241422215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21424241422211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 200832211 + ... + 200938859.

It is an arithmetic number, because the mean of its divisors is an integer number (600942888000).

Almost surely, 2^{21424241422215} is an apocalyptic number.

21424241422215 is a deficient number, since it is larger than the sum of its proper divisors (17036103409785).

21424241422215 is a wasteful number, since it uses less digits than its factorization.

21424241422215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121213 (or 121207 counting only the distinct ones).

The product of its digits is 81920, while the sum is 36.

Adding to 21424241422215 its reverse (51222414242412), we get a palindrome (72646655664627).

The spelling of 21424241422215 in words is "twenty-one trillion, four hundred twenty-four billion, two hundred forty-one million, four hundred twenty-two thousand, two hundred fifteen".