11242571521 has 8 divisors (see below), whose sum is σ = 11316201984. Its totient is φ = 11169095280.

The previous prime is 11242571513. The next prime is 11242571531. The reversal of 11242571521 is 12517524211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11242571521 - 2³ = 11242571513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11242571531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109570 + ... + 185716.

It is an arithmetic number, because the mean of its divisors is an integer number (1414525248).

Almost surely, 2^11242571521 is an apocalyptic number.

It is an amenable number.

11242571521 is a deficient number, since it is larger than the sum of its proper divisors (73630463).

11242571521 is an equidigital number, since it uses as much as digits as its factorization.

11242571521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77111.

The product of its digits is 5600, while the sum is 31.

The spelling of 11242571521 in words is "eleven billion, two hundred forty-two million, five hundred seventy-one thousand, five hundred twenty-one".