111102100121 has 4 divisors (see below), whose sum is σ = 112624046772. Its totient is φ = 109580153472.

The previous prime is 111102100117. The next prime is 111102100141. The reversal of 111102100121 is 121001201111.

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 90878131600 + 20223968521 = 301460^2 + 142211^2 .

It is a cyclic number.

It is not a de Polignac number, because 111102100121 - 2² = 111102100117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111102100141) 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 3 ways as a sum of consecutive naturals, for example, 760973216 + ... + 760973361.

It is an arithmetic number, because the mean of its divisors is an integer number (28156011693).

Almost surely, 2^111102100121 is an apocalyptic number.

It is an amenable number.

111102100121 is a deficient number, since it is larger than the sum of its proper divisors (1521946651).

111102100121 is an equidigital number, since it uses as much as digits as its factorization.

111102100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521946650.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111102100121 its reverse (121001201111), we get a palindrome (232103301232).

The spelling of 111102100121 in words is "one hundred eleven billion, one hundred two million, one hundred thousand, one hundred twenty-one".