13004240021 has 2 divisors, whose sum is σ = 13004240022. Its totient is φ = 13004240020.

The previous prime is 13004240017. The next prime is 13004240063. The reversal of 13004240021 is 12004240031.

13004240021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7875675025 + 5128564996 = 88745^2 + 71614^2 .

It is a cyclic number.

It is not a de Polignac number, because 13004240021 - 2² = 13004240017 is a prime.

It is a super-2 number, since 2×13004240021² (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 (13004290021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6502120010 + 6502120011.

It is an arithmetic number, because the mean of its divisors is an integer number (6502120011).

Almost surely, 2^13004240021 is an apocalyptic number.

It is an amenable number.

13004240021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13004240021 is an equidigital number, since it uses as much as digits as its factorization.

13004240021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 13004240021 its reverse (12004240031), we get a palindrome (25008480052).

The spelling of 13004240021 in words is "thirteen billion, four million, two hundred forty thousand, twenty-one".