20521530005201 has 4 divisors (see below), whose sum is σ = 20958158303232. Its totient is φ = 20084901707172.

The previous prime is 20521530005189. The next prime is 20521530005227. The reversal of 20521530005201 is 10250003512502.

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 a cyclic number.

It is not a de Polignac number, because 20521530005201 - 2¹⁰ = 20521530004177 is a prime.

It is a super-2 number, since 2×20521530005201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20521530005101) 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, 218314148945 + ... + 218314149038.

It is an arithmetic number, because the mean of its divisors is an integer number (5239539575808).

Almost surely, 2^{20521530005201} is an apocalyptic number.

It is an amenable number.

20521530005201 is a deficient number, since it is larger than the sum of its proper divisors (436628298031).

20521530005201 is an equidigital number, since it uses as much as digits as its factorization.

20521530005201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436628298030.

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 20521530005201 its reverse (10250003512502), we get a palindrome (30771533517703).

The spelling of 20521530005201 in words is "twenty trillion, five hundred twenty-one billion, five hundred thirty million, five thousand, two hundred one".