10031311021 has 16 divisors (see below), whose sum is σ = 10164375936. Its totient is φ = 9899525376.

The previous prime is 10031311001. The next prime is 10031311051. The reversal of 10031311021 is 12011313001.

It is a cyclic number.

It is not a de Polignac number, because 10031311021 - 2⁷ = 10031310893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10031310992 and 10031311010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031311001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19180066 + ... + 19180588.

It is an arithmetic number, because the mean of its divisors is an integer number (635273496).

Almost surely, 2^10031311021 is an apocalyptic number.

It is an amenable number.

10031311021 is a deficient number, since it is larger than the sum of its proper divisors (133064915).

10031311021 is a wasteful number, since it uses less digits than its factorization.

10031311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 10031311021 its reverse (12011313001), we get a palindrome (22042624022).

The spelling of 10031311021 in words is "ten billion, thirty-one million, three hundred eleven thousand, twenty-one".