224220240421 has 2 divisors, whose sum is σ = 224220240422. Its totient is φ = 224220240420.

The previous prime is 224220240397. The next prime is 224220240427. The reversal of 224220240421 is 124042022422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216248250625 + 7971989796 = 465025^2 + 89286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224220240421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224220240427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112110120210 + 112110120211.

It is an arithmetic number, because the mean of its divisors is an integer number (112110120211).

Almost surely, 2^224220240421 is an apocalyptic number.

It is an amenable number.

224220240421 is a deficient number, since it is larger than the sum of its proper divisors (1).

224220240421 is an equidigital number, since it uses as much as digits as its factorization.

224220240421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 224220240421 its reverse (124042022422), we get a palindrome (348262262843).

The spelling of 224220240421 in words is "two hundred twenty-four billion, two hundred twenty million, two hundred forty thousand, four hundred twenty-one".