423313002221 has 2 divisors, whose sum is σ = 423313002222. Its totient is φ = 423313002220.

The previous prime is 423313002169. The next prime is 423313002253. The reversal of 423313002221 is 122200313324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258939517321 + 164373484900 = 508861^2 + 405430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423313002221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423313002421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211656501110 + 211656501111.

It is an arithmetic number, because the mean of its divisors is an integer number (211656501111).

Almost surely, 2^423313002221 is an apocalyptic number.

It is an amenable number.

423313002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

423313002221 is an equidigital number, since it uses as much as digits as its factorization.

423313002221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 423313002221 its reverse (122200313324), we get a palindrome (545513315545).

The spelling of 423313002221 in words is "four hundred twenty-three billion, three hundred thirteen million, two thousand, two hundred twenty-one".