205251012301 has 4 divisors (see below), whose sum is σ = 205354000252. Its totient is φ = 205148024352.

The previous prime is 205251012299. The next prime is 205251012347. The reversal of 205251012301 is 103210152502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 84042589801 + 121208422500 = 289901^2 + 348150^2 .

It is a cyclic number.

It is not a de Polignac number, because 205251012301 - 2¹ = 205251012299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205251012361) 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, 51490986 + ... + 51494971.

It is an arithmetic number, because the mean of its divisors is an integer number (51338500063).

Almost surely, 2^205251012301 is an apocalyptic number.

It is an amenable number.

205251012301 is a deficient number, since it is larger than the sum of its proper divisors (102987951).

205251012301 is a wasteful number, since it uses less digits than its factorization.

205251012301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102987950.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 205251012301 its reverse (103210152502), we get a palindrome (308461164803).

The spelling of 205251012301 in words is "two hundred five billion, two hundred fifty-one million, twelve thousand, three hundred one".