11660502353221 has 4 divisors (see below), whose sum is σ = 11665948643244. Its totient is φ = 11655056063200.

The previous prime is 11660502353207. The next prime is 11660502353317. The reversal of 11660502353221 is 12235320506611.

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 5319619344900 + 6340883008321 = 2306430^2 + 2518111^2 .

It is a cyclic number.

It is not a de Polignac number, because 11660502353221 - 2²⁵ = 11660468798789 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 (11660502357221) 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, 2723141800 + ... + 2723146081.

It is an arithmetic number, because the mean of its divisors is an integer number (2916487160811).

Almost surely, 2^{11660502353221} is an apocalyptic number.

It is an amenable number.

11660502353221 is a deficient number, since it is larger than the sum of its proper divisors (5446290023).

11660502353221 is an equidigital number, since it uses as much as digits as its factorization.

11660502353221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5446290022.

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 11660502353221 its reverse (12235320506611), we get a palindrome (23895822859832).

The spelling of 11660502353221 in words is "eleven trillion, six hundred sixty billion, five hundred two million, three hundred fifty-three thousand, two hundred twenty-one".