11354221 has 4 divisors (see below), whose sum is σ = 11396700. Its totient is φ = 11311744.

The previous prime is 11354209. The next prime is 11354237. The reversal of 11354221 is 12245311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12245311 = 13 ⋅941947.

It can be written as a sum of positive squares in 2 ways, for example, as 4536900 + 6817321 = 2130^2 + 2611^2 .

It is a cyclic number.

It is not a de Polignac number, because 11354221 - 2¹³ = 11346029 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11354251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20836 + ... + 21373.

It is an arithmetic number, because the mean of its divisors is an integer number (2849175).

Almost surely, 2^11354221 is an apocalyptic number.

It is an amenable number.

11354221 is a deficient number, since it is larger than the sum of its proper divisors (42479).

11354221 is an equidigital number, since it uses as much as digits as its factorization.

11354221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42478.

The product of its digits is 240, while the sum is 19.

The square root of 11354221 is about 3369.6024988120. The cubic root of 11354221 is about 224.7600470720.

Adding to 11354221 its reverse (12245311), we get a palindrome (23599532).

It can be divided in two parts, 1135 and 4221, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 11354221 in words is "eleven million, three hundred fifty-four thousand, two hundred twenty-one".