16560121201205 has 8 divisors (see below), whose sum is σ = 19905210578904. Its totient is φ = 13226053536000.

The previous prime is 16560121201199. The next prime is 16560121201223. The reversal of 16560121201205 is 50210212106561.

It can be written as a sum of positive squares in 4 ways, for example, as 5802206635729 + 10757914565476 = 2408777^2 + 3279926^2 .

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

It is not a de Polignac number, because 16560121201205 - 2⁴ = 16560121201189 is a prime.

It is a super-2 number, since 2×16560121201205² (a number of 27 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 2755424816 + ... + 2755430825.

It is an arithmetic number, because the mean of its divisors is an integer number (2488151322363).

Almost surely, 2^{16560121201205} is an apocalyptic number.

It is an amenable number.

16560121201205 is a deficient number, since it is larger than the sum of its proper divisors (3345089377699).

16560121201205 is an equidigital number, since it uses as much as digits as its factorization.

16560121201205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510856247.

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 16560121201205 its reverse (50210212106561), we get a palindrome (66770333307766).

The spelling of 16560121201205 in words is "sixteen trillion, five hundred sixty billion, one hundred twenty-one million, two hundred one thousand, two hundred five".