224404121 has 2 divisors, whose sum is σ = 224404122. Its totient is φ = 224404120.

The previous prime is 224404049. The next prime is 224404127. The reversal of 224404121 is 121404422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224400400 + 3721 = 14980^2 + 61^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224404121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 224404093 and 224404102.

It is not a weakly prime, because it can be changed into another prime (224404127) 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, 112202060 + 112202061.

It is an arithmetic number, because the mean of its divisors is an integer number (112202061).

Almost surely, 2^224404121 is an apocalyptic number.

It is an amenable number.

224404121 is a deficient number, since it is larger than the sum of its proper divisors (1).

224404121 is an equidigital number, since it uses as much as digits as its factorization.

224404121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 224404121 is about 14980.1241984170. The cubic root of 224404121 is about 607.6827979880.

Adding to 224404121 its reverse (121404422), we get a palindrome (345808543).

The spelling of 224404121 in words is "two hundred twenty-four million, four hundred four thousand, one hundred twenty-one".