111211200100121 has 4 divisors (see below), whose sum is σ = 121321309200144. Its totient is φ = 101101091000100.

The previous prime is 111211200100097. The next prime is 111211200100151. The reversal of 111211200100121 is 121001002112111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111211200100121 - 2⁶ = 111211200100057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111211200100096 and 111211200100105.

It is not an unprimeable number, because it can be changed into a prime (111211200100151) 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, 5055054549995 + ... + 5055054550016.

It is an arithmetic number, because the mean of its divisors is an integer number (30330327300036).

Almost surely, 2^{111211200100121} is an apocalyptic number.

111211200100121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111211200100121 is a deficient number, since it is larger than the sum of its proper divisors (10110109100023).

111211200100121 is a wasteful number, since it uses less digits than its factorization.

111211200100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110109100022.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111211200100121 its reverse (121001002112111), we get a palindrome (232212202212232).

The spelling of 111211200100121 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred million, one hundred thousand, one hundred twenty-one".