111201121 has 4 divisors (see below), whose sum is σ = 111241732. Its totient is φ = 111160512.

The previous prime is 111201089. The next prime is 111201133. The reversal of 111201121 is 121102111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121102111 = 13 ⋅9315547.

It can be written as a sum of positive squares in 2 ways, for example, as 90041121 + 21160000 = 9489^2 + 4600^2 .

It is a cyclic number.

It is not a de Polignac number, because 111201121 - 2⁵ = 111201089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111201098 and 111201107.

It is not an unprimeable number, because it can be changed into a prime (111201221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15876 + ... + 21781.

It is an arithmetic number, because the mean of its divisors is an integer number (27810433).

Almost surely, 2^111201121 is an apocalyptic number.

It is an amenable number.

111201121 is a deficient number, since it is larger than the sum of its proper divisors (40611).

111201121 is an equidigital number, since it uses as much as digits as its factorization.

111201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40610.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 111201121 is about 10545.1942134794. The cubic root of 111201121 is about 480.8796384541.

Adding to 111201121 its reverse (121102111), we get a palindrome (232303232).

The spelling of 111201121 in words is "one hundred eleven million, two hundred one thousand, one hundred twenty-one".