100031320321 has 4 divisors (see below), whose sum is σ = 105915515652. Its totient is φ = 94147124992.

The previous prime is 100031320303. The next prime is 100031320339. The reversal of 100031320321 is 123023130001.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (100031320303) and next prime (100031320339).

It can be written as a sum of positive squares in 2 ways, for example, as 27502905600 + 72528414721 = 165840^2 + 269311^2 .

It is not a de Polignac number, because 100031320321 - 2³⁵ = 65671581953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100031320295 and 100031320304.

It is not an unprimeable number, because it can be changed into a prime (100031320121) 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, 2942097640 + ... + 2942097673.

It is an arithmetic number, because the mean of its divisors is an integer number (26478878913).

Almost surely, 2^100031320321 is an apocalyptic number.

It is an amenable number.

100031320321 is a deficient number, since it is larger than the sum of its proper divisors (5884195331).

100031320321 is an equidigital number, since it uses as much as digits as its factorization.

100031320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5884195330.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 100031320321 its reverse (123023130001), we get a palindrome (223054450322).

The spelling of 100031320321 in words is "one hundred billion, thirty-one million, three hundred twenty thousand, three hundred twenty-one".