11403221 has 2 divisors, whose sum is σ = 11403222. Its totient is φ = 11403220.

The previous prime is 11403151. The next prime is 11403247. The reversal of 11403221 is 12230411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 579121 = 3290^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 11403221 - 2¹⁰ = 11402197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11403196 and 11403205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11402221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5701610 + 5701611.

It is an arithmetic number, because the mean of its divisors is an integer number (5701611).

Almost surely, 2^11403221 is an apocalyptic number.

It is an amenable number.

11403221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11403221 is an equidigital number, since it uses as much as digits as its factorization.

11403221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 11403221 is about 3376.8655584728. The cubic root of 11403221 is about 225.0829060732.

Adding to 11403221 its reverse (12230411), we get a palindrome (23633632).

The spelling of 11403221 in words is "eleven million, four hundred three thousand, two hundred twenty-one".