21160551322333 has 4 divisors (see below), whose sum is σ = 21166165693660. Its totient is φ = 21154936951008.

The previous prime is 21160551322319. The next prime is 21160551322363. The reversal of 21160551322333 is 33322315506112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12072720074724 + 9087831247609 = 3474582^2 + 3014603^2 .

It is a cyclic number.

It is not a de Polignac number, because 21160551322333 - 2⁹ = 21160551321821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21160551322292 and 21160551322301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160551322303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2807180010 + ... + 2807187547.

It is an arithmetic number, because the mean of its divisors is an integer number (5291541423415).

Almost surely, 2^{21160551322333} is an apocalyptic number.

It is an amenable number.

21160551322333 is a deficient number, since it is larger than the sum of its proper divisors (5614371327).

21160551322333 is an equidigital number, since it uses as much as digits as its factorization.

21160551322333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5614371326.

The product of its (nonzero) digits is 97200, while the sum is 37.

Adding to 21160551322333 its reverse (33322315506112), we get a palindrome (54482866828445).

The spelling of 21160551322333 in words is "twenty-one trillion, one hundred sixty billion, five hundred fifty-one million, three hundred twenty-two thousand, three hundred thirty-three".