10003001021 has 4 divisors (see below), whose sum is σ = 10772462652. Its totient is φ = 9233539392.

The previous prime is 10003001011. The next prime is 10003001039. The reversal of 10003001021 is 12010030001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6286269796 + 3716731225 = 79286^2 + 60965^2 .

It is a cyclic number.

It is not a de Polignac number, because 10003001021 - 2¹⁸ = 10002738877 is a prime.

It is a super-2 number, since 2×10003001021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10003001011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384730796 + ... + 384730821.

It is an arithmetic number, because the mean of its divisors is an integer number (2693115663).

Almost surely, 2^10003001021 is an apocalyptic number.

It is an amenable number.

10003001021 is a deficient number, since it is larger than the sum of its proper divisors (769461631).

10003001021 is an equidigital number, since it uses as much as digits as its factorization.

10003001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769461630.

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 10003001021 its reverse (12010030001), we get a palindrome (22013031022).

The spelling of 10003001021 in words is "ten billion, three million, one thousand, twenty-one".