10013044021 has 4 divisors (see below), whose sum is σ = 10018183500. Its totient is φ = 10007904544.

The previous prime is 10013044003. The next prime is 10013044031. The reversal of 10013044021 is 12044031001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12044031001 = 8233 ⋅1462897.

It can be written as a sum of positive squares in 2 ways, for example, as 9110702500 + 902341521 = 95450^2 + 30039^2 .

It is a cyclic number.

It is not a de Polignac number, because 10013044021 - 2¹³ = 10013035829 is a prime.

It is a super-2 number, since 2×10013044021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10013043986 and 10013044004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10013044031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2566816 + ... + 2570713.

It is an arithmetic number, because the mean of its divisors is an integer number (2504545875).

Almost surely, 2^10013044021 is an apocalyptic number.

It is an amenable number.

10013044021 is a deficient number, since it is larger than the sum of its proper divisors (5139479).

10013044021 is an equidigital number, since it uses as much as digits as its factorization.

10013044021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5139478.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 10013044021 its reverse (12044031001), we get a palindrome (22057075022).

The spelling of 10013044021 in words is "ten billion, thirteen million, forty-four thousand, twenty-one".