100001323121 has 16 divisors (see below), whose sum is σ = 116671526400. Its totient is φ = 85677268320.

The previous prime is 100001323117. The next prime is 100001323129. The reversal of 100001323121 is 121323100001.

It is not a de Polignac number, because 100001323121 - 2² = 100001323117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001323096 and 100001323105.

It is not an unprimeable number, because it can be changed into a prime (100001323129) 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, 720701 + ... + 848181.

It is an arithmetic number, because the mean of its divisors is an integer number (7291970400).

Almost surely, 2^100001323121 is an apocalyptic number.

It is an amenable number.

100001323121 is a deficient number, since it is larger than the sum of its proper divisors (16670203279).

100001323121 is an equidigital number, since it uses as much as digits as its factorization.

100001323121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129789 (or 129775 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 100001323121 its reverse (121323100001), we get a palindrome (221324423122).

The spelling of 100001323121 in words is "one hundred billion, one million, three hundred twenty-three thousand, one hundred twenty-one".