100130521 has 2 divisors, whose sum is σ = 100130522. Its totient is φ = 100130520.

The previous prime is 100130509. The next prime is 100130549. The reversal of 100130521 is 125031001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64561225 + 35569296 = 8035^2 + 5964^2 .

It is a cyclic number.

It is not a de Polignac number, because 100130521 - 2⁵ = 100130489 is a prime.

It is a super-2 number, since 2×100130521² = 20052242471462882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100130581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50065260 + 50065261.

It is an arithmetic number, because the mean of its divisors is an integer number (50065261).

Almost surely, 2^100130521 is an apocalyptic number.

It is an amenable number.

100130521 is a deficient number, since it is larger than the sum of its proper divisors (1).

100130521 is an equidigital number, since it uses as much as digits as its factorization.

100130521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 100130521 is about 10006.5239219221. The cubic root of 100130521 is about 464.3607371716.

Adding to 100130521 its reverse (125031001), we get a palindrome (225161522).

The spelling of 100130521 in words is "one hundred million, one hundred thirty thousand, five hundred twenty-one".