21241203241 has 2 divisors, whose sum is σ = 21241203242. Its totient is φ = 21241203240.

The previous prime is 21241203233. The next prime is 21241203283. The reversal of 21241203241 is 14230214212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18983052841 + 2258150400 = 137779^2 + 47520^2 .

It is a cyclic number.

It is not a de Polignac number, because 21241203241 - 2³ = 21241203233 is a prime.

It is not a weakly prime, because it can be changed into another prime (21241243241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620601620 + 10620601621.

It is an arithmetic number, because the mean of its divisors is an integer number (10620601621).

Almost surely, 2^21241203241 is an apocalyptic number.

It is an amenable number.

21241203241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241203241 is an equidigital number, since it uses as much as digits as its factorization.

21241203241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21241203241 its reverse (14230214212), we get a palindrome (35471417453).

The spelling of 21241203241 in words is "twenty-one billion, two hundred forty-one million, two hundred three thousand, two hundred forty-one".