222403324421 has 2 divisors, whose sum is σ = 222403324422. Its totient is φ = 222403324420.

The previous prime is 222403324391. The next prime is 222403324441. The reversal of 222403324421 is 124423304222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198928488196 + 23474836225 = 446014^2 + 153215^2 .

It is a cyclic number.

It is not a de Polignac number, because 222403324421 - 2²⁶ = 222336215557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222403324441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111201662210 + 111201662211.

It is an arithmetic number, because the mean of its divisors is an integer number (111201662211).

Almost surely, 2^222403324421 is an apocalyptic number.

It is an amenable number.

222403324421 is a deficient number, since it is larger than the sum of its proper divisors (1).

222403324421 is an equidigital number, since it uses as much as digits as its factorization.

222403324421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 222403324421 its reverse (124423304222), we get a palindrome (346826628643).

The spelling of 222403324421 in words is "two hundred twenty-two billion, four hundred three million, three hundred twenty-four thousand, four hundred twenty-one".