201122111 has 6 divisors (see below), whose sum is σ = 203415312. Its totient is φ = 198854480.

The previous prime is 201122101. The next prime is 201122161. The reversal of 201122111 is 111221102.

It is not a de Polignac number, because 201122111 - 2¹⁴ = 201105727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201122092 and 201122101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201122101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4775 + ... + 20616.

It is an arithmetic number, because the mean of its divisors is an integer number (33902552).

Almost surely, 2^201122111 is an apocalyptic number.

201122111 is a deficient number, since it is larger than the sum of its proper divisors (2293201).

201122111 is an frugal number, since it uses more digits than its factorization.

201122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25569 (or 25480 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 201122111 is about 14181.7527478094. The cubic root of 201122111 is about 585.8951994129.

Adding to 201122111 its reverse (111221102), we get a palindrome (312343213).

The spelling of 201122111 in words is "two hundred one million, one hundred twenty-two thousand, one hundred eleven".