10020235021 has 4 divisors (see below), whose sum is σ = 10084058332. Its totient is φ = 9956411712.

The previous prime is 10020234977. The next prime is 10020235033. The reversal of 10020235021 is 12053202001.

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 7389981225 + 2630253796 = 85965^2 + 51286^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020235021 - 2⁹ = 10020234509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10020234986 and 10020235004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020235061) 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, 31911420 + ... + 31911733.

It is an arithmetic number, because the mean of its divisors is an integer number (2521014583).

Almost surely, 2^10020235021 is an apocalyptic number.

It is an amenable number.

10020235021 is a deficient number, since it is larger than the sum of its proper divisors (63823311).

10020235021 is an equidigital number, since it uses as much as digits as its factorization.

10020235021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63823310.

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 10020235021 its reverse (12053202001), we get a palindrome (22073437022).

The spelling of 10020235021 in words is "ten billion, twenty million, two hundred thirty-five thousand, twenty-one".