11225535521 has 16 divisors (see below), whose sum is σ = 12047745600. Its totient is φ = 10426747968.

The previous prime is 11225535511. The next prime is 11225535527. The reversal of 11225535521 is 12553552211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11225535521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11225535527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1887170 + ... + 1893108.

It is an arithmetic number, because the mean of its divisors is an integer number (752984100).

Almost surely, 2^11225535521 is an apocalyptic number.

It is an amenable number.

11225535521 is a deficient number, since it is larger than the sum of its proper divisors (822210079).

11225535521 is a wasteful number, since it uses less digits than its factorization.

11225535521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7888.

The product of its digits is 15000, while the sum is 32.

The spelling of 11225535521 in words is "eleven billion, two hundred twenty-five million, five hundred thirty-five thousand, five hundred twenty-one".