201040621 has 2 divisors, whose sum is σ = 201040622. Its totient is φ = 201040620.

The previous prime is 201040531. The next prime is 201040633. The reversal of 201040621 is 126040102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179184996 + 21855625 = 13386^2 + 4675^2 .

It is a cyclic number.

It is not a de Polignac number, because 201040621 - 2¹¹ = 201038573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201040595 and 201040604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201040421) 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, 100520310 + 100520311.

It is an arithmetic number, because the mean of its divisors is an integer number (100520311).

Almost surely, 2^201040621 is an apocalyptic number.

It is an amenable number.

201040621 is a deficient number, since it is larger than the sum of its proper divisors (1).

201040621 is an equidigital number, since it uses as much as digits as its factorization.

201040621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 201040621 is about 14178.8793985985. The cubic root of 201040621 is about 585.8160583555.

Adding to 201040621 its reverse (126040102), we get a palindrome (327080723).

The spelling of 201040621 in words is "two hundred one million, forty thousand, six hundred twenty-one".