10031023021 has 4 divisors (see below), whose sum is σ = 10045840572. Its totient is φ = 10016205472.

The previous prime is 10031023007. The next prime is 10031023087. The reversal of 10031023021 is 12032013001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12032013001 = 283 ⋅42515947.

It can be written as a sum of positive squares in 2 ways, for example, as 8159508900 + 1871514121 = 90330^2 + 43261^2 .

It is a cyclic number.

It is not a de Polignac number, because 10031023021 - 2²¹ = 10028925869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10031022992 and 10031023010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031023091) 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, 7407760 + ... + 7409113.

It is an arithmetic number, because the mean of its divisors is an integer number (2511460143).

Almost surely, 2^10031023021 is an apocalyptic number.

It is an amenable number.

10031023021 is a deficient number, since it is larger than the sum of its proper divisors (14817551).

10031023021 is an equidigital number, since it uses as much as digits as its factorization.

10031023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14817550.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 10031023021 its reverse (12032013001), we get a palindrome (22063036022).

The spelling of 10031023021 in words is "ten billion, thirty-one million, twenty-three thousand, twenty-one".