10003120021 has 16 divisors (see below), whose sum is σ = 10440119808. Its totient is φ = 9573580800.

The previous prime is 10003120009. The next prime is 10003120031. The reversal of 10003120021 is 12002130001.

It is a cyclic number.

It is not a de Polignac number, because 10003120021 - 2¹⁵ = 10003087253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10003120031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2230101 + ... + 2234581.

It is an arithmetic number, because the mean of its divisors is an integer number (652507488).

Almost surely, 2^10003120021 is an apocalyptic number.

It is an amenable number.

10003120021 is a deficient number, since it is larger than the sum of its proper divisors (436999787).

10003120021 is a wasteful number, since it uses less digits than its factorization.

10003120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 10003120021 its reverse (12002130001), we get a palindrome (22005250022).

The spelling of 10003120021 in words is "ten billion, three million, one hundred twenty thousand, twenty-one".