121111101101111 has 8 divisors (see below), whose sum is σ = 132851152591248. Its totient is φ = 109492708176000.

The previous prime is 121111101101077. The next prime is 121111101101117. The reversal of 121111101101111 is 111101101111121.

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 121111101101111 - 2³⁰ = 121110027359287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111101101117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30414639170 + ... + 30414643151.

It is an arithmetic number, because the mean of its divisors is an integer number (16606394073906).

Almost surely, 2^{121111101101111} is an apocalyptic number.

121111101101111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121111101101111 is a deficient number, since it is larger than the sum of its proper divisors (11740051490137).

121111101101111 is a wasteful number, since it uses less digits than its factorization.

121111101101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60829282513.

The product of its (nonzero) digits is 2, while the sum is 14.

Adding to 121111101101111 its reverse (111101101111121), we get a palindrome (232212202212232).

It can be divided in two parts, 121 and 111101101111, that multiplied together give a palindrome (13443233234431).

The spelling of 121111101101111 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred one million, one hundred one thousand, one hundred eleven".