424330420421 has 2 divisors, whose sum is σ = 424330420422. Its totient is φ = 424330420420.

The previous prime is 424330420411. The next prime is 424330420441. The reversal of 424330420421 is 124024033424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340600632100 + 83729788321 = 583610^2 + 289361^2 .

It is a cyclic number.

It is not a de Polignac number, because 424330420421 - 2¹⁴ = 424330404037 is a prime.

It is a super-2 number, since 2×424330420421² (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 (424330420411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212165210210 + 212165210211.

It is an arithmetic number, because the mean of its divisors is an integer number (212165210211).

Almost surely, 2^424330420421 is an apocalyptic number.

It is an amenable number.

424330420421 is a deficient number, since it is larger than the sum of its proper divisors (1).

424330420421 is an equidigital number, since it uses as much as digits as its factorization.

424330420421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 424330420421 its reverse (124024033424), we get a palindrome (548354453845).

The spelling of 424330420421 in words is "four hundred twenty-four billion, three hundred thirty million, four hundred twenty thousand, four hundred twenty-one".