101115521 has 16 divisors (see below), whose sum is σ = 117304320. Its totient is φ = 86391360.

The previous prime is 101115517. The next prime is 101115527. The reversal of 101115521 is 125511101.

It is a cyclic number.

It is not a de Polignac number, because 101115521 - 2² = 101115517 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 101115521.

It is not an unprimeable number, because it can be changed into a prime (101115527) 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 15 ways as a sum of consecutive naturals, for example, 3815 + ... + 14723.

It is an arithmetic number, because the mean of its divisors is an integer number (7331520).

Almost surely, 2^101115521 is an apocalyptic number.

It is an amenable number.

101115521 is a deficient number, since it is larger than the sum of its proper divisors (16188799).

101115521 is a wasteful number, since it uses less digits than its factorization.

101115521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10976.

The product of its (nonzero) digits is 50, while the sum is 17.

The square root of 101115521 is about 10055.6213631978. The cubic root of 101115521 is about 465.8784350760.

Adding to 101115521 its reverse (125511101), we get a palindrome (226626622).

The spelling of 101115521 in words is "one hundred one million, one hundred fifteen thousand, five hundred twenty-one".