12352320011221 has 4 divisors (see below), whose sum is σ = 12356826515244. Its totient is φ = 12347813507200.

The previous prime is 12352320011219. The next prime is 12352320011261. The reversal of 12352320011221 is 12211002325321.

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 6882825708196 + 5469494303025 = 2623514^2 + 2338695^2 .

It is a cyclic number.

It is not a de Polignac number, because 12352320011221 - 2¹ = 12352320011219 is a prime.

It is a super-2 number, since 2×12352320011221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12352320011261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2253247900 + ... + 2253253381.

It is an arithmetic number, because the mean of its divisors is an integer number (3089206628811).

Almost surely, 2^{12352320011221} is an apocalyptic number.

It is an amenable number.

12352320011221 is a deficient number, since it is larger than the sum of its proper divisors (4506504023).

12352320011221 is an equidigital number, since it uses as much as digits as its factorization.

12352320011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506504022.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 12352320011221 its reverse (12211002325321), we get a palindrome (24563322336542).

The spelling of 12352320011221 in words is "twelve trillion, three hundred fifty-two billion, three hundred twenty million, eleven thousand, two hundred twenty-one".