442503501413221 has 2 divisors, whose sum is σ = 442503501413222. Its totient is φ = 442503501413220.

The previous prime is 442503501413173. The next prime is 442503501413297. The reversal of 442503501413221 is 122314105305244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234350600888196 + 208152900525025 = 15308514^2 + 14427505^2 .

It is a cyclic number.

It is not a de Polignac number, because 442503501413221 - 2⁷ = 442503501413093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442503501513221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221251750706610 + 221251750706611.

It is an arithmetic number, because the mean of its divisors is an integer number (221251750706611).

Almost surely, 2^{442503501413221} is an apocalyptic number.

It is an amenable number.

442503501413221 is a deficient number, since it is larger than the sum of its proper divisors (1).

442503501413221 is an equidigital number, since it uses as much as digits as its factorization.

442503501413221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 442503501413221 its reverse (122314105305244), we get a palindrome (564817606718465).

The spelling of 442503501413221 in words is "four hundred forty-two trillion, five hundred three billion, five hundred one million, four hundred thirteen thousand, two hundred twenty-one".