21302242135 has 16 divisors (see below), whose sum is σ = 25649882784. Its totient is φ = 16983724032.

The previous prime is 21302242127. The next prime is 21302242163. The reversal of 21302242135 is 53124220312.

It is a cyclic number.

It is not a de Polignac number, because 21302242135 - 2³ = 21302242127 is a prime.

It is a Duffinian number.

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, 5845624 + ... + 5849266.

It is an arithmetic number, because the mean of its divisors is an integer number (1603117674).

Almost surely, 2^21302242135 is an apocalyptic number.

21302242135 is a deficient number, since it is larger than the sum of its proper divisors (4347640649).

21302242135 is a wasteful number, since it uses less digits than its factorization.

21302242135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21302242135 its reverse (53124220312), we get a palindrome (74426462447).

The spelling of 21302242135 in words is "twenty-one billion, three hundred two million, two hundred forty-two thousand, one hundred thirty-five".