100111231021 has 8 divisors (see below), whose sum is σ = 106051458080. Its totient is φ = 94238125488.

The previous prime is 100111230971. The next prime is 100111231027. The reversal of 100111231021 is 120132111001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100111231021 - 2⁷ = 100111230893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100111230992 and 100111231010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111231027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16777311 + ... + 16783276.

It is an arithmetic number, because the mean of its divisors is an integer number (13256432260).

Almost surely, 2^100111231021 is an apocalyptic number.

It is an amenable number.

100111231021 is a deficient number, since it is larger than the sum of its proper divisors (5940227059).

100111231021 is a wasteful number, since it uses less digits than its factorization.

100111231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33560763.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 100111231021 its reverse (120132111001), we get a palindrome (220243342022).

The spelling of 100111231021 in words is "one hundred billion, one hundred eleven million, two hundred thirty-one thousand, twenty-one".