224324300021 has 2 divisors, whose sum is σ = 224324300022. Its totient is φ = 224324300020.

The previous prime is 224324299987. The next prime is 224324300023. The reversal of 224324300021 is 120003423422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172299708100 + 52024591921 = 415090^2 + 228089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224324300021 is a prime.

Together with 224324300023, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 224324300021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224324300023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112162150010 + 112162150011.

It is an arithmetic number, because the mean of its divisors is an integer number (112162150011).

Almost surely, 2^224324300021 is an apocalyptic number.

It is an amenable number.

224324300021 is a deficient number, since it is larger than the sum of its proper divisors (1).

224324300021 is an equidigital number, since it uses as much as digits as its factorization.

224324300021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 224324300021 its reverse (120003423422), we get a palindrome (344327723443).

The spelling of 224324300021 in words is "two hundred twenty-four billion, three hundred twenty-four million, three hundred thousand, twenty-one".