213443244123 has 4 divisors (see below), whose sum is σ = 284590992168. Its totient is φ = 142295496080.

The previous prime is 213443244097. The next prime is 213443244139. The reversal of 213443244123 is 321442344312.

213443244123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213443244123 - 2¹³ = 213443235931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213443244193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35573874018 + ... + 35573874023.

It is an arithmetic number, because the mean of its divisors is an integer number (71147748042).

Almost surely, 2^213443244123 is an apocalyptic number.

213443244123 is a deficient number, since it is larger than the sum of its proper divisors (71147748045).

213443244123 is an equidigital number, since it uses as much as digits as its factorization.

213443244123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71147748044.

The product of its digits is 55296, while the sum is 33.

Adding to 213443244123 its reverse (321442344312), we get a palindrome (534885588435).

The spelling of 213443244123 in words is "two hundred thirteen billion, four hundred forty-three million, two hundred forty-four thousand, one hundred twenty-three".