100000111121 has 4 divisors (see below), whose sum is σ = 100019720244. Its totient is φ = 99980502000.

The previous prime is 100000111061. The next prime is 100000111151. The reversal of 100000111121 is 121111000001.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 58140625 + 99941970496 = 7625^2 + 316136^2 .

It is a cyclic number.

It is not a de Polignac number, because 100000111121 - 2¹⁰ = 100000110097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100000111099 and 100000111108.

It is not an unprimeable number, because it can be changed into a prime (100000111151) 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, 9796910 + ... + 9807111.

It is an arithmetic number, because the mean of its divisors is an integer number (25004930061).

Almost surely, 2^100000111121 is an apocalyptic number.

It is an amenable number.

100000111121 is a deficient number, since it is larger than the sum of its proper divisors (19609123).

100000111121 is an equidigital number, since it uses as much as digits as its factorization.

100000111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19609122.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 100000111121 its reverse (121111000001), we get a palindrome (221111111122).

The spelling of 100000111121 in words is "one hundred billion, one hundred eleven thousand, one hundred twenty-one".