21616205325133 has 8 divisors (see below), whose sum is σ = 21744576956160. Its totient is φ = 21488195815440.

The previous prime is 21616205325119. The next prime is 21616205325227. The reversal of 21616205325133 is 33152350261612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21616205325133 - 2¹³ = 21616205316941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21616205395133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90410593 + ... + 90649366.

It is an arithmetic number, because the mean of its divisors is an integer number (2718072119520).

Almost surely, 2^{21616205325133} is an apocalyptic number.

It is an amenable number.

21616205325133 is a deficient number, since it is larger than the sum of its proper divisors (128371631027).

21616205325133 is a wasteful number, since it uses less digits than its factorization.

21616205325133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181060667.

The product of its (nonzero) digits is 194400, while the sum is 40.

Adding to 21616205325133 its reverse (33152350261612), we get a palindrome (54768555586745).

The spelling of 21616205325133 in words is "twenty-one trillion, six hundred sixteen billion, two hundred five million, three hundred twenty-five thousand, one hundred thirty-three".