442120431500221 has 2 divisors, whose sum is σ = 442120431500222. Its totient is φ = 442120431500220.

The previous prime is 442120431500183. The next prime is 442120431500239. The reversal of 442120431500221 is 122005134021244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284718039488100 + 157402392012121 = 16873590^2 + 12546011^2 .

It is a cyclic number.

It is not a de Polignac number, because 442120431500221 - 2⁷ = 442120431500093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442120431500291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221060215750110 + 221060215750111.

It is an arithmetic number, because the mean of its divisors is an integer number (221060215750111).

Almost surely, 2^{442120431500221} is an apocalyptic number.

It is an amenable number.

442120431500221 is a deficient number, since it is larger than the sum of its proper divisors (1).

442120431500221 is an equidigital number, since it uses as much as digits as its factorization.

442120431500221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 442120431500221 its reverse (122005134021244), we get a palindrome (564125565521465).

The spelling of 442120431500221 in words is "four hundred forty-two trillion, one hundred twenty billion, four hundred thirty-one million, five hundred thousand, two hundred twenty-one".