205112001 has 4 divisors (see below), whose sum is σ = 273482672. Its totient is φ = 136741332.

The previous prime is 205111993. The next prime is 205112003. The reversal of 205112001 is 100211502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 205112001 - 2³ = 205111993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205112003) 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, 34185331 + ... + 34185336.

It is an arithmetic number, because the mean of its divisors is an integer number (68370668).

Almost surely, 2^205112001 is an apocalyptic number.

It is an amenable number.

205112001 is a deficient number, since it is larger than the sum of its proper divisors (68370671).

205112001 is an equidigital number, since it uses as much as digits as its factorization.

205112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68370670.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 205112001 is about 14321.7317737765. The cubic root of 205112001 is about 589.7442164264.

Adding to 205112001 its reverse (100211502), we get a palindrome (305323503).

The spelling of 205112001 in words is "two hundred five million, one hundred twelve thousand, one".