121102111111111 has 12 divisors (see below), whose sum is σ = 131139086626152. Its totient is φ = 111782431409376.

The previous prime is 121102111111109. The next prime is 121102111111169. The reversal of 121102111111111 is 111111111201121.

It is not a de Polignac number, because 121102111111111 - 2¹ = 121102111111109 is a prime.

It is a Duffinian number.

121102111111111 is a modest number, since divided by 11111111 gives 1211021 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102111111811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8656261 + ... + 17808286.

It is an arithmetic number, because the mean of its divisors is an integer number (10928257218846).

Almost surely, 2^{121102111111111} is an apocalyptic number.

121102111111111 is a deficient number, since it is larger than the sum of its proper divisors (10036975515041).

121102111111111 is a wasteful number, since it uses less digits than its factorization.

121102111111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26491650 (or 26491637 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 16.

Adding to 121102111111111 its reverse (111111111201121), we get a palindrome (232213222312232).

The spelling of 121102111111111 in words is "one hundred twenty-one trillion, one hundred two billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".