10243000021 has 12 divisors (see below), whose sum is σ = 11337586092. Its totient is φ = 9221311616.

The previous prime is 10243000007. The next prime is 10243000039. The reversal of 10243000021 is 12000034201.

10243000021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5100102225 + 5142897796 = 71415^2 + 71714^2 .

It is not a de Polignac number, because 10243000021 - 2⁵ = 10242999989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10242999965 and 10243000010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10243000421) 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 in 11 ways as a sum of consecutive naturals, for example, 560506 + ... + 578491.

It is an arithmetic number, because the mean of its divisors is an integer number (944798841).

Almost surely, 2^10243000021 is an apocalyptic number.

It is an amenable number.

10243000021 is a deficient number, since it is larger than the sum of its proper divisors (1094586071).

10243000021 is a wasteful number, since it uses less digits than its factorization.

10243000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139060 (or 1139037 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 10243000021 its reverse (12000034201), we get a palindrome (22243034222).

The spelling of 10243000021 in words is "ten billion, two hundred forty-three million, twenty-one", and thus it is an aban number.