10100031321 has 4 divisors (see below), whose sum is σ = 13466708432. Its totient is φ = 6733354212.

The previous prime is 10100031311. The next prime is 10100031323. The reversal of 10100031321 is 12313000101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12313000101 = 3 ⋅4104333367.

It is a de Polignac number, because none of the positive numbers 2^k-10100031321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10100031297 and 10100031306.

It is not an unprimeable number, because it can be changed into a prime (10100031323) 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, 1683338551 + ... + 1683338556.

It is an arithmetic number, because the mean of its divisors is an integer number (3366677108).

Almost surely, 2^10100031321 is an apocalyptic number.

It is an amenable number.

10100031321 is a deficient number, since it is larger than the sum of its proper divisors (3366677111).

10100031321 is an equidigital number, since it uses as much as digits as its factorization.

10100031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366677110.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 10100031321 its reverse (12313000101), we get a palindrome (22413031422).

The spelling of 10100031321 in words is "ten billion, one hundred million, thirty-one thousand, three hundred twenty-one".