420304230421 has 2 divisors, whose sum is σ = 420304230422. Its totient is φ = 420304230420.

The previous prime is 420304230373. The next prime is 420304230509. The reversal of 420304230421 is 124032403024.

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., 385778874321 + 34525356100 = 621111^2 + 185810^2 .

It is a cyclic number.

It is not a de Polignac number, because 420304230421 - 2¹³ = 420304222229 is a prime.

It is a super-2 number, since 2×420304230421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420304230221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210152115210 + 210152115211.

It is an arithmetic number, because the mean of its divisors is an integer number (210152115211).

Almost surely, 2^420304230421 is an apocalyptic number.

It is an amenable number.

420304230421 is a deficient number, since it is larger than the sum of its proper divisors (1).

420304230421 is an equidigital number, since it uses as much as digits as its factorization.

420304230421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 420304230421 its reverse (124032403024), we get a palindrome (544336633445).

The spelling of 420304230421 in words is "four hundred twenty billion, three hundred four million, two hundred thirty thousand, four hundred twenty-one".