204211113321243 has 16 divisors (see below), whose sum is σ = 327556672997120. Its totient is φ = 110550377136096.

The previous prime is 204211113321227. The next prime is 204211113321263. The reversal of 204211113321243 is 342123311112402.

It is not a de Polignac number, because 204211113321243 - 2⁴ = 204211113321227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204211113321243.

It is not an unprimeable number, because it can be changed into a prime (204211113321223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255903650380 + ... + 255903651177.

It is an arithmetic number, because the mean of its divisors is an integer number (20472292062320).

Almost surely, 2^{204211113321243} is an apocalyptic number.

204211113321243 is a deficient number, since it is larger than the sum of its proper divisors (123345559675877).

204211113321243 is a wasteful number, since it uses less digits than its factorization.

204211113321243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511807301586.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 204211113321243 its reverse (342123311112402), we get a palindrome (546334424433645).

The spelling of 204211113321243 in words is "two hundred four trillion, two hundred eleven billion, one hundred thirteen million, three hundred twenty-one thousand, two hundred forty-three".