100001331021 has 16 divisors (see below), whose sum is σ = 136074342528. Its totient is φ = 65309899200.

The previous prime is 100001331013. The next prime is 100001331071. The reversal of 100001331021 is 120133100001.

It is not a de Polignac number, because 100001331021 - 2³ = 100001331013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100001330988 and 100001331006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001331071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1461750 + ... + 1528631.

It is an arithmetic number, because the mean of its divisors is an integer number (8504646408).

Almost surely, 2^100001331021 is an apocalyptic number.

It is an amenable number.

100001331021 is a deficient number, since it is larger than the sum of its proper divisors (36073011507).

100001331021 is a wasteful number, since it uses less digits than its factorization.

100001331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990612.

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

Adding to 100001331021 its reverse (120133100001), we get a palindrome (220134431022).

The spelling of 100001331021 in words is "one hundred billion, one million, three hundred thirty-one thousand, twenty-one".