11241221 has 2 divisors, whose sum is σ = 11241222. Its totient is φ = 11241220.

The previous prime is 11241203. The next prime is 11241239. The reversal of 11241221 is 12214211.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (11241203) and next prime (11241239).

It can be written as a sum of positive squares in only one way, i.e., 7672900 + 3568321 = 2770^2 + 1889^2 .

It is a cyclic number.

It is not a de Polignac number, because 11241221 - 2¹⁸ = 10979077 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11241196 and 11241205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11241281) 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 as a sum of consecutive naturals, namely, 5620610 + 5620611.

It is an arithmetic number, because the mean of its divisors is an integer number (5620611).

Almost surely, 2^11241221 is an apocalyptic number.

It is an amenable number.

11241221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11241221 is an equidigital number, since it uses as much as digits as its factorization.

11241221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 14.

The square root of 11241221 is about 3352.7930147863. The cubic root of 11241221 is about 224.0119373421.

Adding to 11241221 its reverse (12214211), we get a palindrome (23455432).

The spelling of 11241221 in words is "eleven million, two hundred forty-one thousand, two hundred twenty-one".