445107105221 has 2 divisors, whose sum is σ = 445107105222. Its totient is φ = 445107105220.

The previous prime is 445107105211. The next prime is 445107105263. The reversal of 445107105221 is 122501701544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223606036900 + 221501068321 = 472870^2 + 470639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445107105221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445107105211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222553552610 + 222553552611.

It is an arithmetic number, because the mean of its divisors is an integer number (222553552611).

Almost surely, 2^445107105221 is an apocalyptic number.

It is an amenable number.

445107105221 is a deficient number, since it is larger than the sum of its proper divisors (1).

445107105221 is an equidigital number, since it uses as much as digits as its factorization.

445107105221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 32.

Adding to 445107105221 its reverse (122501701544), we get a palindrome (567608806765).

The spelling of 445107105221 in words is "four hundred forty-five billion, one hundred seven million, one hundred five thousand, two hundred twenty-one".