21022210241 has 2 divisors, whose sum is σ = 21022210242. Its totient is φ = 21022210240.

The previous prime is 21022210193. The next prime is 21022210247. The reversal of 21022210241 is 14201222012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16769214016 + 4252996225 = 129496^2 + 65215^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022210241 - 2²² = 21018015937 is a prime.

It is not a weakly prime, because it can be changed into another prime (21022210247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511105120 + 10511105121.

It is an arithmetic number, because the mean of its divisors is an integer number (10511105121).

Almost surely, 2^21022210241 is an apocalyptic number.

It is an amenable number.

21022210241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022210241 is an equidigital number, since it uses as much as digits as its factorization.

21022210241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21022210241 its reverse (14201222012), we get a palindrome (35223432253).

The spelling of 21022210241 in words is "twenty-one billion, twenty-two million, two hundred ten thousand, two hundred forty-one".