10031231021 has 8 divisors (see below), whose sum is σ = 12138632640. Its totient is φ = 8092421568.

The previous prime is 10031230999. The next prime is 10031231033. The reversal of 10031231021 is 12013213001.

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

It is not a de Polignac number, because 10031231021 - 2¹⁸ = 10030968877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10031230987 and 10031231005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031231081) 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, 42147911 + ... + 42148148.

It is an arithmetic number, because the mean of its divisors is an integer number (1517329080).

Almost surely, 2^10031231021 is an apocalyptic number.

It is an amenable number.

10031231021 is a deficient number, since it is larger than the sum of its proper divisors (2107401619).

10031231021 is an equidigital number, since it uses as much as digits as its factorization.

10031231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84296083.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 10031231021 its reverse (12013213001), we get a palindrome (22044444022).

The spelling of 10031231021 in words is "ten billion, thirty-one million, two hundred thirty-one thousand, twenty-one".