10020011021 has 4 divisors (see below), whose sum is σ = 10609423452. Its totient is φ = 9430598592.

The previous prime is 10020011011. The next prime is 10020011077. The reversal of 10020011021 is 12011002001.

10020011021 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 an emirpimes, since its reverse is a distinct semiprime: 12011002001 = 523 ⋅22965587.

It can be written as a sum of positive squares in 2 ways, for example, as 7337806921 + 2682204100 = 85661^2 + 51790^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020011021 - 2³⁰ = 8946269197 is a prime.

It is a super-2 number, since 2×10020011021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020011011) 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, 294706190 + ... + 294706223.

It is an arithmetic number, because the mean of its divisors is an integer number (2652355863).

Almost surely, 2^10020011021 is an apocalyptic number.

It is an amenable number.

10020011021 is a deficient number, since it is larger than the sum of its proper divisors (589412431).

10020011021 is an equidigital number, since it uses as much as digits as its factorization.

10020011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589412430.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 10020011021 its reverse (12011002001), we get a palindrome (22031013022).

The spelling of 10020011021 in words is "ten billion, twenty million, eleven thousand, twenty-one".