12320300211221 has 4 divisors (see below), whose sum is σ = 12398773461132. Its totient is φ = 12241826961312.

The previous prime is 12320300211187. The next prime is 12320300211259. The reversal of 12320300211221 is 12211200302321.

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 4066090767025 + 8254209444196 = 2016455^2 + 2873014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12320300211221 is a prime.

It is a super-2 number, since 2×12320300211221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12320300211193 and 12320300211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320300211281) 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, 39236624720 + ... + 39236625033.

It is an arithmetic number, because the mean of its divisors is an integer number (3099693365283).

Almost surely, 2^{12320300211221} is an apocalyptic number.

It is an amenable number.

12320300211221 is a deficient number, since it is larger than the sum of its proper divisors (78473249911).

12320300211221 is an equidigital number, since it uses as much as digits as its factorization.

12320300211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78473249910.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12320300211221 its reverse (12211200302321), we get a palindrome (24531500513542).

The spelling of 12320300211221 in words is "twelve trillion, three hundred twenty billion, three hundred million, two hundred eleven thousand, two hundred twenty-one".