121111102200111 has 16 divisors (see below), whose sum is σ = 168502657950720. Its totient is φ = 77230151245280.

The previous prime is 121111102200107. The next prime is 121111102200133. The reversal of 121111102200111 is 111002201111121.

It is a cyclic number.

It is not a de Polignac number, because 121111102200111 - 2² = 121111102200107 is a prime.

It is a super-2 number, since 2×121111102200111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111102200161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85058101 + ... + 86470241.

It is an arithmetic number, because the mean of its divisors is an integer number (10531416121920).

Almost surely, 2^{121111102200111} is an apocalyptic number.

121111102200111 is a deficient number, since it is larger than the sum of its proper divisors (47391555750609).

121111102200111 is a wasteful number, since it uses less digits than its factorization.

121111102200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655126.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121111102200111 its reverse (111002201111121), we get a palindrome (232113303311232).

The spelling of 121111102200111 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred two million, two hundred thousand, one hundred eleven".