445241342112221 has 2 divisors, whose sum is σ = 445241342112222. Its totient is φ = 445241342112220.

The previous prime is 445241342112191. The next prime is 445241342112253. The reversal of 445241342112221 is 122211243142544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359958222679225 + 85283119432996 = 18972565^2 + 9234886^2 .

It is a cyclic number.

It is not a de Polignac number, because 445241342112221 - 2³⁰ = 445240268370397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445241342112121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222620671056110 + 222620671056111.

It is an arithmetic number, because the mean of its divisors is an integer number (222620671056111).

Almost surely, 2^{445241342112221} is an apocalyptic number.

It is an amenable number.

445241342112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

445241342112221 is an equidigital number, since it uses as much as digits as its factorization.

445241342112221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122880, while the sum is 38.

Adding to 445241342112221 its reverse (122211243142544), we get a palindrome (567452585254765).

The spelling of 445241342112221 in words is "four hundred forty-five trillion, two hundred forty-one billion, three hundred forty-two million, one hundred twelve thousand, two hundred twenty-one".