11533248521 has 4 divisors (see below), whose sum is σ = 11537941200. Its totient is φ = 11528555844.

The previous prime is 11533248499. The next prime is 11533248527. The reversal of 11533248521 is 12584233511.

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: 12584233511 = 421 ⋅29891291.

It is a cyclic number.

It is not a de Polignac number, because 11533248521 - 2⁶ = 11533248457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11533248527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342651 + ... + 2347568.

It is an arithmetic number, because the mean of its divisors is an integer number (2884485300).

Almost surely, 2^11533248521 is an apocalyptic number.

It is an amenable number.

11533248521 is a deficient number, since it is larger than the sum of its proper divisors (4692679).

11533248521 is an equidigital number, since it uses as much as digits as its factorization.

11533248521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692678.

The product of its digits is 28800, while the sum is 35.

The spelling of 11533248521 in words is "eleven billion, five hundred thirty-three million, two hundred forty-eight thousand, five hundred twenty-one".