222324121421 has 2 divisors, whose sum is σ = 222324121422. Its totient is φ = 222324121420.

The previous prime is 222324121417. The next prime is 222324121441. The reversal of 222324121421 is 124121423222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216666975625 + 5657145796 = 465475^2 + 75214^2 .

It is a cyclic number.

It is not a de Polignac number, because 222324121421 - 2² = 222324121417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222324121441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111162060710 + 111162060711.

It is an arithmetic number, because the mean of its divisors is an integer number (111162060711).

Almost surely, 2^222324121421 is an apocalyptic number.

It is an amenable number.

222324121421 is a deficient number, since it is larger than the sum of its proper divisors (1).

222324121421 is an equidigital number, since it uses as much as digits as its factorization.

222324121421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 26.

Adding to 222324121421 its reverse (124121423222), we get a palindrome (346445544643).

The spelling of 222324121421 in words is "two hundred twenty-two billion, three hundred twenty-four million, one hundred twenty-one thousand, four hundred twenty-one".