521132101 has 12 divisors (see below), whose sum is σ = 607861452. Its totient is φ = 445471488.

The previous prime is 521132081. The next prime is 521132149. The reversal of 521132101 is 101231125.

It can be written as a sum of positive squares in 2 ways, for example, as 413512225 + 107619876 = 20335^2 + 10374^2 .

It is not a de Polignac number, because 521132101 - 2⁵ = 521132069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521132401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4021 + ... + 32533.

It is an arithmetic number, because the mean of its divisors is an integer number (50655121).

Almost surely, 2^521132101 is an apocalyptic number.

It is an amenable number.

521132101 is a deficient number, since it is larger than the sum of its proper divisors (86729351).

521132101 is a wasteful number, since it uses less digits than its factorization.

521132101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28900 (or 28893 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 521132101 is about 22828.3179625657. The cubic root of 521132101 is about 804.7283015031.

Adding to 521132101 its reverse (101231125), we get a palindrome (622363226).

The spelling of 521132101 in words is "five hundred twenty-one million, one hundred thirty-two thousand, one hundred one".