521012201 has 2 divisors, whose sum is σ = 521012202. Its totient is φ = 521012200.

The previous prime is 521012183. The next prime is 521012203. The reversal of 521012201 is 102210125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 357172201 + 163840000 = 18899^2 + 12800^2 .

It is a cyclic number.

It is not a de Polignac number, because 521012201 - 2¹⁸ = 520750057 is a prime.

Together with 521012203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (521012203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260506100 + 260506101.

It is an arithmetic number, because the mean of its divisors is an integer number (260506101).

Almost surely, 2^521012201 is an apocalyptic number.

It is an amenable number.

521012201 is a deficient number, since it is larger than the sum of its proper divisors (1).

521012201 is an equidigital number, since it uses as much as digits as its factorization.

521012201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 521012201 is about 22825.6916872195. The cubic root of 521012201 is about 804.6665805409. Note that the first 3 decimals are identical.

Adding to 521012201 its reverse (102210125), we get a palindrome (623222326).

The spelling of 521012201 in words is "five hundred twenty-one million, twelve thousand, two hundred one".