10031010021 has 48 divisors (see below), whose sum is σ = 15982686720. Its totient is φ = 6036157440.

The previous prime is 10031009993. The next prime is 10031010053. The reversal of 10031010021 is 12001013001.

It is not a de Polignac number, because 10031010021 - 2¹³ = 10031001829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10031009985 and 10031010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031010061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 356556 + ... + 383658.

It is an arithmetic number, because the mean of its divisors is an integer number (332972640).

Almost surely, 2^10031010021 is an apocalyptic number.

It is an amenable number.

10031010021 is a deficient number, since it is larger than the sum of its proper divisors (5951676699).

10031010021 is a wasteful number, since it uses less digits than its factorization.

10031010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27226 (or 27223 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 10031010021 its reverse (12001013001), we get a palindrome (22032023022).

The spelling of 10031010021 in words is "ten billion, thirty-one million, ten thousand, twenty-one".