205321013242 has 8 divisors (see below), whose sum is σ = 324191073600. Its totient is φ = 97257322044.

The previous prime is 205321013213. The next prime is 205321013243. The reversal of 205321013242 is 242310123502.

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

It is not an unprimeable number, because it can be changed into a prime (205321013243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2701592242 + ... + 2701592317.

It is an arithmetic number, because the mean of its divisors is an integer number (40523884200).

Almost surely, 2^205321013242 is an apocalyptic number.

205321013242 is a deficient number, since it is larger than the sum of its proper divisors (118870060358).

205321013242 is a wasteful number, since it uses less digits than its factorization.

205321013242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5403184580.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 205321013242 its reverse (242310123502), we get a palindrome (447631136744).

The spelling of 205321013242 in words is "two hundred five billion, three hundred twenty-one million, thirteen thousand, two hundred forty-two".