424020434313821 has 2 divisors, whose sum is σ = 424020434313822. Its totient is φ = 424020434313820.

The previous prime is 424020434313809. The next prime is 424020434313841. The reversal of 424020434313821 is 128313434020424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370954148428900 + 53066285884921 = 19260170^2 + 7284661^2 .

It is a cyclic number.

It is not a de Polignac number, because 424020434313821 - 2⁶ = 424020434313757 is a prime.

It is a super-2 number, since 2×424020434313821² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424020434313841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212010217156910 + 212010217156911.

It is an arithmetic number, because the mean of its divisors is an integer number (212010217156911).

Almost surely, 2^{424020434313821} is an apocalyptic number.

It is an amenable number.

424020434313821 is a deficient number, since it is larger than the sum of its proper divisors (1).

424020434313821 is an equidigital number, since it uses as much as digits as its factorization.

424020434313821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 442368, while the sum is 41.

The spelling of 424020434313821 in words is "four hundred twenty-four trillion, twenty billion, four hundred thirty-four million, three hundred thirteen thousand, eight hundred twenty-one".