521108101 has 2 divisors, whose sum is σ = 521108102. Its totient is φ = 521108100.

The previous prime is 521108069. The next prime is 521108141. The reversal of 521108101 is 101801125.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 489736900 + 31371201 = 22130^2 + 5601^2 .

It is a cyclic number.

It is not a de Polignac number, because 521108101 - 2⁵ = 521108069 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521108141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260554050 + 260554051.

It is an arithmetic number, because the mean of its divisors is an integer number (260554051).

Almost surely, 2^521108101 is an apocalyptic number.

It is an amenable number.

521108101 is a deficient number, since it is larger than the sum of its proper divisors (1).

521108101 is an equidigital number, since it uses as much as digits as its factorization.

521108101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 521108101 is about 22827.7922936056. The cubic root of 521108101 is about 804.7159477731.

Adding to 521108101 its reverse (101801125), we get a palindrome (622909226).

The spelling of 521108101 in words is "five hundred twenty-one million, one hundred eight thousand, one hundred one".