111311121 has 16 divisors (see below), whose sum is σ = 157550400. Its totient is φ = 69662208.

The previous prime is 111311029. The next prime is 111311131. The reversal of 111311121 is 121113111.

It is not a de Polignac number, because 111311121 - 2¹¹ = 111309073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111311097 and 111311106.

It is not an unprimeable number, because it can be changed into a prime (111311131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18765 + ... + 23973.

It is an arithmetic number, because the mean of its divisors is an integer number (9846900).

Almost surely, 2^111311121 is an apocalyptic number.

It is an amenable number.

111311121 is a deficient number, since it is larger than the sum of its proper divisors (46239279).

111311121 is a wasteful number, since it uses less digits than its factorization.

111311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5648.

The product of its digits is 6, while the sum is 12.

The square root of 111311121 is about 10550.4085702877. The cubic root of 111311121 is about 481.0381480313.

Adding to 111311121 its reverse (121113111), we get a palindrome (232424232).

The spelling of 111311121 in words is "one hundred eleven million, three hundred eleven thousand, one hundred twenty-one".