101241521 has 4 divisors (see below), whose sum is σ = 101263344. Its totient is φ = 101219700.

The previous prime is 101241487. The next prime is 101241541. The reversal of 101241521 is 125142101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125142101 = 7 ⋅17877443.

It is a cyclic number.

It is not a de Polignac number, because 101241521 - 2⁶ = 101241457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101241521.

It is not an unprimeable number, because it can be changed into a prime (101241541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875 + ... + 14256.

It is an arithmetic number, because the mean of its divisors is an integer number (25315836).

Almost surely, 2^101241521 is an apocalyptic number.

It is an amenable number.

101241521 is a deficient number, since it is larger than the sum of its proper divisors (21823).

101241521 is an equidigital number, since it uses as much as digits as its factorization.

101241521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21822.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 101241521 is about 10061.8845650305. The cubic root of 101241521 is about 466.0718650487.

Adding to 101241521 its reverse (125142101), we get a palindrome (226383622).

The spelling of 101241521 in words is "one hundred one million, two hundred forty-one thousand, five hundred twenty-one".