11232120221 has 16 divisors (see below), whose sum is σ = 13059811200. Its totient is φ = 9460343808.

The previous prime is 11232120217. The next prime is 11232120227. The reversal of 11232120221 is 12202123211.

It is a cyclic number.

It is not a de Polignac number, because 11232120221 - 2² = 11232120217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11232120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11232120227) 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, 1364165 + ... + 1372373.

It is an arithmetic number, because the mean of its divisors is an integer number (816238200).

Almost surely, 2^11232120221 is an apocalyptic number.

It is an amenable number.

11232120221 is a deficient number, since it is larger than the sum of its proper divisors (1827690979).

11232120221 is an equidigital number, since it uses as much as digits as its factorization.

11232120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11588.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 11232120221 its reverse (12202123211), we get a palindrome (23434243432).

The spelling of 11232120221 in words is "eleven billion, two hundred thirty-two million, one hundred twenty thousand, two hundred twenty-one".