100031231321 has 16 divisors (see below), whose sum is σ = 114786571776. Its totient is φ = 85392812736.

The previous prime is 100031231273. The next prime is 100031231359. The reversal of 100031231321 is 123132130001.

It is not a de Polignac number, because 100031231321 - 2³⁰ = 98957489497 is a prime.

It is a super-2 number, since 2×100031231321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100031231321.

It is not an unprimeable number, because it can be changed into a prime (100031231381) 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, 1919015 + ... + 1970451.

It is an arithmetic number, because the mean of its divisors is an integer number (7174160736).

Almost surely, 2^100031231321 is an apocalyptic number.

It is an amenable number.

100031231321 is a deficient number, since it is larger than the sum of its proper divisors (14755340455).

100031231321 is an equidigital number, since it uses as much as digits as its factorization.

100031231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52568.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 100031231321 its reverse (123132130001), we get a palindrome (223163361322).

The spelling of 100031231321 in words is "one hundred billion, thirty-one million, two hundred thirty-one thousand, three hundred twenty-one".