12213323220321 has 6 divisors (see below), whose sum is σ = 17641466873810. Its totient is φ = 8142215480208.

The previous prime is 12213323220283. The next prime is 12213323220331. The reversal of 12213323220321 is 12302232331221.

12213323220321 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 332 + 3 + 2 + 2 + 0 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9937871648721 + 2275451571600 = 3152439^2 + 1508460^2 .

It is not a de Polignac number, because 12213323220321 - 2¹⁰ = 12213323219297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12213323220331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 678517956676 + ... + 678517956693.

Almost surely, 2^{12213323220321} is an apocalyptic number.

It is an amenable number.

12213323220321 is a deficient number, since it is larger than the sum of its proper divisors (5428143653489).

12213323220321 is a wasteful number, since it uses less digits than its factorization.

12213323220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357035913375 (or 1357035913372 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 12213323220321 its reverse (12302232331221), we get a palindrome (24515555551542).

The spelling of 12213323220321 in words is "twelve trillion, two hundred thirteen billion, three hundred twenty-three million, two hundred twenty thousand, three hundred twenty-one".