201205460521 has 4 divisors (see below), whose sum is σ = 216682803652. Its totient is φ = 185728117392.

The previous prime is 201205460513. The next prime is 201205460531. The reversal of 201205460521 is 125064502102.

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 14874241600 + 186331218921 = 121960^2 + 431661^2 .

It is a cyclic number.

It is not a de Polignac number, because 201205460521 - 2³ = 201205460513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201205460521.

It is not an unprimeable number, because it can be changed into a prime (201205460531) 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, 7738671546 + ... + 7738671571.

It is an arithmetic number, because the mean of its divisors is an integer number (54170700913).

Almost surely, 2^201205460521 is an apocalyptic number.

It is an amenable number.

201205460521 is a deficient number, since it is larger than the sum of its proper divisors (15477343131).

201205460521 is a wasteful number, since it uses less digits than its factorization.

201205460521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15477343130.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 201205460521 its reverse (125064502102), we get a palindrome (326269962623).

The spelling of 201205460521 in words is "two hundred one billion, two hundred five million, four hundred sixty thousand, five hundred twenty-one".