11306221 has 4 divisors (see below), whose sum is σ = 11328444. Its totient is φ = 11284000.

The previous prime is 11306219. The next prime is 11306249. The reversal of 11306221 is 12260311.

11306221 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.

It can be written as a sum of positive squares in 2 ways, for example, as 6832996 + 4473225 = 2614^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 11306221 - 2¹ = 11306219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11306195 and 11306204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11306521) 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, 10330 + ... + 11371.

It is an arithmetic number, because the mean of its divisors is an integer number (2832111).

Almost surely, 2^11306221 is an apocalyptic number.

It is an amenable number.

11306221 is a deficient number, since it is larger than the sum of its proper divisors (22223).

11306221 is an equidigital number, since it uses as much as digits as its factorization.

11306221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22222.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 11306221 is about 3362.4724534188. The cubic root of 11306221 is about 224.4428751338.

Adding to 11306221 its reverse (12260311), we get a palindrome (23566532).

The spelling of 11306221 in words is "eleven million, three hundred six thousand, two hundred twenty-one".