10231321021 has 8 divisors (see below), whose sum is σ = 10834051320. Its totient is φ = 9628689408.

The previous prime is 10231321019. The next prime is 10231321031. The reversal of 10231321021 is 12012313201.

It can be written as a sum of positive squares in 4 ways, for example, as 5865415396 + 4365905625 = 76586^2 + 66075^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10231321021 - 2¹ = 10231321019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10231320986 and 10231321004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10231321031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362595 + ... + 389791.

It is an arithmetic number, because the mean of its divisors is an integer number (1354256415).

Almost surely, 2^10231321021 is an apocalyptic number.

It is an amenable number.

10231321021 is a deficient number, since it is larger than the sum of its proper divisors (602730299).

10231321021 is a wasteful number, since it uses less digits than its factorization.

10231321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49343.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 10231321021 its reverse (12012313201), we get a palindrome (22243634222).

The spelling of 10231321021 in words is "ten billion, two hundred thirty-one million, three hundred twenty-one thousand, twenty-one".