11227656521 has 16 divisors (see below), whose sum is σ = 11691001728. Its totient is φ = 10773840000.

The previous prime is 11227656487. The next prime is 11227656551. The reversal of 11227656521 is 12565672211.

It is a cyclic number.

It is not a de Polignac number, because 11227656521 - 2¹⁰ = 11227655497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11227656551) 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, 2038271 + ... + 2043771.

It is an arithmetic number, because the mean of its divisors is an integer number (730687608).

Almost surely, 2^11227656521 is an apocalyptic number.

It is an amenable number.

11227656521 is a deficient number, since it is larger than the sum of its proper divisors (463345207).

11227656521 is an equidigital number, since it uses as much as digits as its factorization.

11227656521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6352.

The product of its digits is 50400, while the sum is 38.

The spelling of 11227656521 in words is "eleven billion, two hundred twenty-seven million, six hundred fifty-six thousand, five hundred twenty-one".