11045011521 has 4 divisors (see below), whose sum is σ = 14726682032. Its totient is φ = 7363341012.

The previous prime is 11045011513. The next prime is 11045011531. The reversal of 11045011521 is 12511054011.

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.

It is not a de Polignac number, because 11045011521 - 2³ = 11045011513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11045011501) 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, 1840835251 + ... + 1840835256.

It is an arithmetic number, because the mean of its divisors is an integer number (3681670508).

Almost surely, 2^11045011521 is an apocalyptic number.

It is an amenable number.

11045011521 is a deficient number, since it is larger than the sum of its proper divisors (3681670511).

11045011521 is an equidigital number, since it uses as much as digits as its factorization.

11045011521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3681670510.

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 11045011521 its reverse (12511054011), we get a palindrome (23556065532).

The spelling of 11045011521 in words is "eleven billion, forty-five million, eleven thousand, five hundred twenty-one".