213440320121444 has 48 divisors (see below), whose sum is σ = 410323065051312. Its totient is φ = 96538910787072.

The previous prime is 213440320121443. The next prime is 213440320121467. The reversal of 213440320121444 is 444121023044312.

It can be written as a sum of positive squares in 8 ways, for example, as 8965817344 + 213431354304100 = 94688^2 + 14609290^2 .

It is not an unprimeable number, because it can be changed into a prime (213440320121443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43045199 + ... + 47746934.

It is an arithmetic number, because the mean of its divisors is an integer number (8548397188569).

Almost surely, 2^{213440320121444} is an apocalyptic number.

It is an amenable number.

213440320121444 is a deficient number, since it is larger than the sum of its proper divisors (196882744929868).

213440320121444 is a wasteful number, since it uses less digits than its factorization.

213440320121444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90793056 (or 90793054 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 213440320121444 its reverse (444121023044312), we get a palindrome (657561343165756).

The spelling of 213440320121444 in words is "two hundred thirteen trillion, four hundred forty billion, three hundred twenty million, one hundred twenty-one thousand, four hundred forty-four".