10003123021 has 4 divisors (see below), whose sum is σ = 10529603200. Its totient is φ = 9476642844.

The previous prime is 10003123007. The next prime is 10003123037. The reversal of 10003123021 is 12032130001.

10003123021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10003123021 - 2¹⁹ = 10002598733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10003122992 and 10003123010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10003123321) 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 3 ways as a sum of consecutive naturals, for example, 263240061 + ... + 263240098.

It is an arithmetic number, because the mean of its divisors is an integer number (2632400800).

Almost surely, 2^10003123021 is an apocalyptic number.

It is an amenable number.

10003123021 is a deficient number, since it is larger than the sum of its proper divisors (526480179).

10003123021 is an equidigital number, since it uses as much as digits as its factorization.

10003123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526480178.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 10003123021 its reverse (12032130001), we get a palindrome (22035253022).

The spelling of 10003123021 in words is "ten billion, three million, one hundred twenty-three thousand, twenty-one".