442420000000421 has 2 divisors, whose sum is σ = 442420000000422. Its totient is φ = 442420000000420.

The previous prime is 442420000000397. The next prime is 442420000000439. The reversal of 442420000000421 is 124000000024244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 293496686745025 + 148923313255396 = 17131745^2 + 12203414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442420000000421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442420000000481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221210000000210 + 221210000000211.

It is an arithmetic number, because the mean of its divisors is an integer number (221210000000211).

Almost surely, 2^{442420000000421} is an apocalyptic number.

It is an amenable number.

442420000000421 is a deficient number, since it is larger than the sum of its proper divisors (1).

442420000000421 is an equidigital number, since it uses as much as digits as its factorization.

442420000000421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 442420000000421 its reverse (124000000024244), we get a palindrome (566420000024665).

The spelling of 442420000000421 in words is "four hundred forty-two trillion, four hundred twenty billion, four hundred twenty-one", and thus it is an aban number.