21010323241 has 2 divisors, whose sum is σ = 21010323242. Its totient is φ = 21010323240.

The previous prime is 21010323223. The next prime is 21010323247. The reversal of 21010323241 is 14232301012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20967040000 + 43283241 = 144800^2 + 6579^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010323241 - 2¹¹ = 21010321193 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010323247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505161620 + 10505161621.

It is an arithmetic number, because the mean of its divisors is an integer number (10505161621).

Almost surely, 2^21010323241 is an apocalyptic number.

It is an amenable number.

21010323241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010323241 is an equidigital number, since it uses as much as digits as its factorization.

21010323241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21010323241 its reverse (14232301012), we get a palindrome (35242624253).

The spelling of 21010323241 in words is "twenty-one billion, ten million, three hundred twenty-three thousand, two hundred forty-one".