403224242221 has 2 divisors, whose sum is σ = 403224242222. Its totient is φ = 403224242220.

The previous prime is 403224242143. The next prime is 403224242227. The reversal of 403224242221 is 122242422304.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218332842121 + 184891400100 = 467261^2 + 429990^2 .

It is a cyclic number.

It is not a de Polignac number, because 403224242221 - 2¹⁹ = 403223717933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 403224242221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403224242227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201612121110 + 201612121111.

It is an arithmetic number, because the mean of its divisors is an integer number (201612121111).

Almost surely, 2^403224242221 is an apocalyptic number.

It is an amenable number.

403224242221 is a deficient number, since it is larger than the sum of its proper divisors (1).

403224242221 is an equidigital number, since it uses as much as digits as its factorization.

403224242221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 403224242221 its reverse (122242422304), we get a palindrome (525466664525).

The spelling of 403224242221 in words is "four hundred three billion, two hundred twenty-four million, two hundred forty-two thousand, two hundred twenty-one".