423430213321 has 2 divisors, whose sum is σ = 423430213322. Its totient is φ = 423430213320.

The previous prime is 423430213289. The next prime is 423430213337. The reversal of 423430213321 is 123312034324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342706038921 + 80724174400 = 585411^2 + 284120^2 .

It is a cyclic number.

It is not a de Polignac number, because 423430213321 - 2⁵ = 423430213289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423430213321.

It is not a weakly prime, because it can be changed into another prime (423430213351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211715106660 + 211715106661.

It is an arithmetic number, because the mean of its divisors is an integer number (211715106661).

Almost surely, 2^423430213321 is an apocalyptic number.

It is an amenable number.

423430213321 is a deficient number, since it is larger than the sum of its proper divisors (1).

423430213321 is an equidigital number, since it uses as much as digits as its factorization.

423430213321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 423430213321 its reverse (123312034324), we get a palindrome (546742247645).

The spelling of 423430213321 in words is "four hundred twenty-three billion, four hundred thirty million, two hundred thirteen thousand, three hundred twenty-one".