21102301243215 has 12 divisors (see below), whose sum is σ = 36577322154984. Its totient is φ = 11254560663024.

The previous prime is 21102301243201. The next prime is 21102301243217. The reversal of 21102301243215 is 51234210320112.

It is a happy number.

21102301243215 is a `hidden beast` number, since 2 + 1 + 10 + 2 + 301 + 24 + 321 + 5 = 666.

It is not a de Polignac number, because 21102301243215 - 2⁸ = 21102301242959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102301243217) 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 11 ways as a sum of consecutive naturals, for example, 234470013769 + ... + 234470013858.

It is an arithmetic number, because the mean of its divisors is an integer number (3048110179582).

Almost surely, 2^{21102301243215} is an apocalyptic number.

21102301243215 is a deficient number, since it is larger than the sum of its proper divisors (15475020911769).

21102301243215 is a wasteful number, since it uses less digits than its factorization.

21102301243215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468940027638 (or 468940027635 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 21102301243215 its reverse (51234210320112), we get a palindrome (72336511563327).

The spelling of 21102301243215 in words is "twenty-one trillion, one hundred two billion, three hundred one million, two hundred forty-three thousand, two hundred fifteen".