21240241301 has 2 divisors, whose sum is σ = 21240241302. Its totient is φ = 21240241300.

The previous prime is 21240241289. The next prime is 21240241307. The reversal of 21240241301 is 10314204212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19503519025 + 1736722276 = 139655^2 + 41674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21240241301 is a prime.

It is a super-2 number, since 2×21240241301² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21240241307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620120650 + 10620120651.

It is an arithmetic number, because the mean of its divisors is an integer number (10620120651).

Almost surely, 2^21240241301 is an apocalyptic number.

It is an amenable number.

21240241301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21240241301 is an equidigital number, since it uses as much as digits as its factorization.

21240241301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21240241301 its reverse (10314204212), we get a palindrome (31554445513).

The spelling of 21240241301 in words is "twenty-one billion, two hundred forty million, two hundred forty-one thousand, three hundred one".