201111121 has 8 divisors (see below), whose sum is σ = 204228864. Its totient is φ = 198001440.

The previous prime is 201111107. The next prime is 201111161. The reversal of 201111121 is 121111102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201111121 - 2⁵ = 201111089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201111098 and 201111107.

It is not an unprimeable number, because it can be changed into a prime (201111161) 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 7 ways as a sum of consecutive naturals, for example, 65016 + ... + 68038.

It is an arithmetic number, because the mean of its divisors is an integer number (25528608).

Almost surely, 2^201111121 is an apocalyptic number.

It is an amenable number.

201111121 is a deficient number, since it is larger than the sum of its proper divisors (3117743).

201111121 is an equidigital number, since it uses as much as digits as its factorization.

201111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031.

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

The square root of 201111121 is about 14181.3652727796. The cubic root of 201111121 is about 585.8845274460.

Adding to 201111121 its reverse (121111102), we get a palindrome (322222223).

The spelling of 201111121 in words is "two hundred one million, one hundred eleven thousand, one hundred twenty-one".