21310302241 has 2 divisors, whose sum is σ = 21310302242. Its totient is φ = 21310302240.

The previous prime is 21310302199. The next prime is 21310302389. The reversal of 21310302241 is 14220301312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15129984016 + 6180318225 = 123004^2 + 78615^2 .

It is a cyclic number.

It is not a de Polignac number, because 21310302241 - 2²⁵ = 21276747809 is a prime.

It is not a weakly prime, because it can be changed into another prime (21310305241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655151120 + 10655151121.

It is an arithmetic number, because the mean of its divisors is an integer number (10655151121).

Almost surely, 2^21310302241 is an apocalyptic number.

It is an amenable number.

21310302241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310302241 is an equidigital number, since it uses as much as digits as its factorization.

21310302241 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21310302241 its reverse (14220301312), we get a palindrome (35530603553).

The spelling of 21310302241 in words is "twenty-one billion, three hundred ten million, three hundred two thousand, two hundred forty-one".