11052221 has 4 divisors (see below), whose sum is σ = 11060700. Its totient is φ = 11043744.

The previous prime is 11052203. The next prime is 11052241. The reversal of 11052221 is 12225011.

11052221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12225011 = 41 ⋅298171.

It can be written as a sum of positive squares in 2 ways, for example, as 5359225 + 5692996 = 2315^2 + 2386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11052221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11052196 and 11052205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11052241) 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, 1826 + ... + 5043.

It is an arithmetic number, because the mean of its divisors is an integer number (2765175).

Almost surely, 2^11052221 is an apocalyptic number.

It is an amenable number.

11052221 is a deficient number, since it is larger than the sum of its proper divisors (8479).

11052221 is an equidigital number, since it uses as much as digits as its factorization.

11052221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8478.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 11052221 is about 3324.4880808931. The cubic root of 11052221 is about 222.7493883407.

Adding to 11052221 its reverse (12225011), we get a palindrome (23277232).

The spelling of 11052221 in words is "eleven million, fifty-two thousand, two hundred twenty-one".