201013202521 has 2 divisors, whose sum is σ = 201013202522. Its totient is φ = 201013202520.

The previous prime is 201013202519. The next prime is 201013202531. The reversal of 201013202521 is 125202310102.

201013202521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180615650121 + 20397552400 = 424989^2 + 142820^2 .

It is a cyclic number.

It is not a de Polignac number, because 201013202521 - 2¹ = 201013202519 is a prime.

It is a super-4 number, since 4×201013202521⁴ (a number of 46 digits) contains 4444 as substring.

Together with 201013202519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (201013202531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100506601260 + 100506601261.

It is an arithmetic number, because the mean of its divisors is an integer number (100506601261).

Almost surely, 2^201013202521 is an apocalyptic number.

It is an amenable number.

201013202521 is a deficient number, since it is larger than the sum of its proper divisors (1).

201013202521 is an equidigital number, since it uses as much as digits as its factorization.

201013202521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 201013202521 its reverse (125202310102), we get a palindrome (326215512623).

The spelling of 201013202521 in words is "two hundred one billion, thirteen million, two hundred two thousand, five hundred twenty-one".