445122121 has 2 divisors, whose sum is σ = 445122122. Its totient is φ = 445122120.

The previous prime is 445122089. The next prime is 445122127. The reversal of 445122121 is 121221544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283450896 + 161671225 = 16836^2 + 12715^2 .

It is a cyclic number.

It is not a de Polignac number, because 445122121 - 2⁵ = 445122089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 445122092 and 445122101.

It is not a weakly prime, because it can be changed into another prime (445122127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222561060 + 222561061.

It is an arithmetic number, because the mean of its divisors is an integer number (222561061).

Almost surely, 2^445122121 is an apocalyptic number.

It is an amenable number.

445122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

445122121 is an equidigital number, since it uses as much as digits as its factorization.

445122121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640, while the sum is 22.

The square root of 445122121 is about 21097.9174564695. The cubic root of 445122121 is about 763.5305043989.

Adding to 445122121 its reverse (121221544), we get a palindrome (566343665).

The spelling of 445122121 in words is "four hundred forty-five million, one hundred twenty-two thousand, one hundred twenty-one".