13441221 has 10 divisors (see below), whose sum is σ = 20078982. Its totient is φ = 8960760.

The previous prime is 13441213. The next prime is 13441247. The reversal of 13441221 is 12214431.

13441221 is a `hidden beast` number, since 1 + 3 + 441 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9696996 + 3744225 = 3114^2 + 1935^2 .

It is not a de Polignac number, because 13441221 - 2³ = 13441213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13441194 and 13441203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13441261) 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 9 ways as a sum of consecutive naturals, for example, 82890 + ... + 83051.

Almost surely, 2^13441221 is an apocalyptic number.

It is an amenable number.

13441221 is a deficient number, since it is larger than the sum of its proper divisors (6637761).

13441221 is an equidigital number, since it uses as much as digits as its factorization.

13441221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165953 (or 165944 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 13441221 is about 3666.2270797101. The cubic root of 13441221 is about 237.7640778218.

Adding to 13441221 its reverse (12214431), we get a palindrome (25655652).

The spelling of 13441221 in words is "thirteen million, four hundred forty-one thousand, two hundred twenty-one".