111100100121 has 32 divisors (see below), whose sum is σ = 165626496000. Its totient is φ = 73602739584.

The previous prime is 111100100117. The next prime is 111100100171. The reversal of 111100100121 is 121001001111.

It is not a de Polignac number, because 111100100121 - 2² = 111100100117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (111100100101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3409735 + ... + 3442163.

It is an arithmetic number, because the mean of its divisors is an integer number (5175828000).

Almost surely, 2^111100100121 is an apocalyptic number.

It is an amenable number.

111100100121 is a deficient number, since it is larger than the sum of its proper divisors (54526395879).

111100100121 is a wasteful number, since it uses less digits than its factorization.

111100100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33230 (or 33224 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 111100100121 its reverse (121001001111), we get a palindrome (232101101232).

The spelling of 111100100121 in words is "one hundred eleven billion, one hundred million, one hundred thousand, one hundred twenty-one".