424234211021 has 2 divisors, whose sum is σ = 424234211022. Its totient is φ = 424234211020.

The previous prime is 424234210997. The next prime is 424234211053. The reversal of 424234211021 is 120112432424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419630588521 + 4603622500 = 647789^2 + 67850^2 .

It is a cyclic number.

It is not a de Polignac number, because 424234211021 - 2³⁰ = 423160469197 is a prime.

It is a super-2 number, since 2×424234211021² (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 (424234211321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212117105510 + 212117105511.

It is an arithmetic number, because the mean of its divisors is an integer number (212117105511).

Almost surely, 2^424234211021 is an apocalyptic number.

It is an amenable number.

424234211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

424234211021 is an equidigital number, since it uses as much as digits as its factorization.

424234211021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 424234211021 its reverse (120112432424), we get a palindrome (544346643445).

The spelling of 424234211021 in words is "four hundred twenty-four billion, two hundred thirty-four million, two hundred eleven thousand, twenty-one".