111111011121 has 64 divisors (see below), whose sum is σ = 170844235776. Its totient is φ = 63575424000.

The previous prime is 111111011117. The next prime is 111111011159. The reversal of 111111011121 is 121110111111.

It is not a de Polignac number, because 111111011121 - 2² = 111111011117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111111011097 and 111111011106.

It is not an unprimeable number, because it can be changed into a prime (111111011111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26598585 + ... + 26602761.

It is an arithmetic number, because the mean of its divisors is an integer number (2669441184).

Almost surely, 2^111111011121 is an apocalyptic number.

111111011121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111111011121 is a deficient number, since it is larger than the sum of its proper divisors (59733224655).

111111011121 is a wasteful number, since it uses less digits than its factorization.

111111011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4662.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 111111011121 its reverse (121110111111), we get a palindrome (232221122232).

The spelling of 111111011121 in words is "one hundred eleven billion, one hundred eleven million, eleven thousand, one hundred twenty-one".