12213134302321 has 4 divisors (see below), whose sum is σ = 12634276864500. Its totient is φ = 11791991740144.

The previous prime is 12213134302307. The next prime is 12213134302357. The reversal of 12213134302321 is 12320343131221.

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 5448396272400 + 6764738029921 = 2334180^2 + 2600911^2 .

It is a cyclic number.

It is not a de Polignac number, because 12213134302321 - 2¹¹ = 12213134300273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12213134302321.

It is not an unprimeable number, because it can be changed into a prime (12213134308321) 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, 210571281046 + ... + 210571281103.

It is an arithmetic number, because the mean of its divisors is an integer number (3158569216125).

Almost surely, 2^{12213134302321} is an apocalyptic number.

It is an amenable number.

12213134302321 is a deficient number, since it is larger than the sum of its proper divisors (421142562179).

12213134302321 is an equidigital number, since it uses as much as digits as its factorization.

12213134302321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421142562178.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 12213134302321 its reverse (12320343131221), we get a palindrome (24533477433542).

The spelling of 12213134302321 in words is "twelve trillion, two hundred thirteen billion, one hundred thirty-four million, three hundred two thousand, three hundred twenty-one".