111140215121 has 12 divisors (see below), whose sum is σ = 127426341132. Its totient is φ = 96556202496.

The previous prime is 111140215091. The next prime is 111140215129. The reversal of 111140215121 is 121512041111.

It can be written as a sum of positive squares in 6 ways, for example, as 31692900625 + 79447314496 = 178025^2 + 281864^2 .

It is not a de Polignac number, because 111140215121 - 2¹⁸ = 111139952977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111140215093 and 111140215102.

It is not an unprimeable number, because it can be changed into a prime (111140215129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19339316 + ... + 19345061.

It is an arithmetic number, because the mean of its divisors is an integer number (10618861761).

Almost surely, 2^111140215121 is an apocalyptic number.

It is an amenable number.

111140215121 is a deficient number, since it is larger than the sum of its proper divisors (16286126011).

111140215121 is a wasteful number, since it uses less digits than its factorization.

111140215121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38684420 (or 38684407 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 20.

Adding to 111140215121 its reverse (121512041111), we get a palindrome (232652256232).

The spelling of 111140215121 in words is "one hundred eleven billion, one hundred forty million, two hundred fifteen thousand, one hundred twenty-one".