205111311204 has 12 divisors (see below), whose sum is σ = 478593059504. Its totient is φ = 68370437064.

The previous prime is 205111311193. The next prime is 205111311221. The reversal of 205111311204 is 402113111502.

205111311204 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8546304622 + ... + 8546304645.

Almost surely, 2^205111311204 is an apocalyptic number.

It is an amenable number.

205111311204 is an abundant number, since it is smaller than the sum of its proper divisors (273481748300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205111311204 is a wasteful number, since it uses less digits than its factorization.

205111311204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17092609274 (or 17092609272 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 205111311204 its reverse (402113111502), we get a palindrome (607224422706).

The spelling of 205111311204 in words is "two hundred five billion, one hundred eleven million, three hundred eleven thousand, two hundred four".