213144443332321 has 8 divisors (see below), whose sum is σ = 225791429786280. Its totient is φ = 200509576658688.

The previous prime is 213144443332319. The next prime is 213144443332333. The reversal of 213144443332321 is 123233344441312.

213144443332321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 59257664410000 + 153886778922321 = 7697900^2 + 12405111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213144443332321 - 2¹ = 213144443332319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213144443330321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3029908866 + ... + 3029979211.

It is an arithmetic number, because the mean of its divisors is an integer number (28223928723285).

Almost surely, 2^{213144443332321} is an apocalyptic number.

It is an amenable number.

213144443332321 is a deficient number, since it is larger than the sum of its proper divisors (12646986453959).

213144443332321 is a wasteful number, since it uses less digits than its factorization.

213144443332321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6059890163.

The product of its digits is 497664, while the sum is 40.

Adding to 213144443332321 its reverse (123233344441312), we get a palindrome (336377787773633).

The spelling of 213144443332321 in words is "two hundred thirteen trillion, one hundred forty-four billion, four hundred forty-three million, three hundred thirty-two thousand, three hundred twenty-one".