11351221 has 8 divisors (see below), whose sum is σ = 13011840. Its totient is φ = 9700368.

The previous prime is 11351191. The next prime is 11351237. The reversal of 11351221 is 12215311.

11351221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11351221 - 2⁹ = 11350709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11351195 and 11351204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11351251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255 + ... + 4771.

It is an arithmetic number, because the mean of its divisors is an integer number (1626480).

Almost surely, 2^11351221 is an apocalyptic number.

It is an amenable number.

11351221 is a deficient number, since it is larger than the sum of its proper divisors (1660619).

11351221 is an equidigital number, since it uses as much as digits as its factorization.

11351221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4883.

The product of its digits is 60, while the sum is 16.

The square root of 11351221 is about 3369.1573130384. The cubic root of 11351221 is about 224.7402500428.

Adding to 11351221 its reverse (12215311), we get a palindrome (23566532).

The spelling of 11351221 in words is "eleven million, three hundred fifty-one thousand, two hundred twenty-one".