21344220241 has 2 divisors, whose sum is σ = 21344220242. Its totient is φ = 21344220240.

The previous prime is 21344220203. The next prime is 21344220251. The reversal of 21344220241 is 14202244312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20677289616 + 666930625 = 143796^2 + 25825^2 .

It is a cyclic number.

It is not a de Polignac number, because 21344220241 - 2⁷ = 21344220113 is a prime.

It is not a weakly prime, because it can be changed into another prime (21344220251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672110120 + 10672110121.

It is an arithmetic number, because the mean of its divisors is an integer number (10672110121).

Almost surely, 2^21344220241 is an apocalyptic number.

It is an amenable number.

21344220241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344220241 is an equidigital number, since it uses as much as digits as its factorization.

21344220241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21344220241 its reverse (14202244312), we get a palindrome (35546464553).

The spelling of 21344220241 in words is "twenty-one billion, three hundred forty-four million, two hundred twenty thousand, two hundred forty-one".