10205441221 has 4 divisors (see below), whose sum is σ = 10206570700. Its totient is φ = 10204311744.

The previous prime is 10205441203. The next prime is 10205441227. The reversal of 10205441221 is 12214450201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12214450201 = 27791 ⋅439511.

It can be written as a sum of positive squares in 2 ways, for example, as 2850492100 + 7354949121 = 53390^2 + 85761^2 .

It is a cyclic number.

It is not a de Polignac number, because 10205441221 - 2⁹ = 10205440709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10205441192 and 10205441201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10205441227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551076 + ... + 569293.

It is an arithmetic number, because the mean of its divisors is an integer number (2551642675).

Almost surely, 2^10205441221 is an apocalyptic number.

It is an amenable number.

10205441221 is a deficient number, since it is larger than the sum of its proper divisors (1129479).

10205441221 is an equidigital number, since it uses as much as digits as its factorization.

10205441221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129478.

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

Adding to 10205441221 its reverse (12214450201), we get a palindrome (22419891422).

The spelling of 10205441221 in words is "ten billion, two hundred five million, four hundred forty-one thousand, two hundred twenty-one".