2211121 has 4 divisors (see below), whose sum is σ = 2412144. Its totient is φ = 2010100.

The previous prime is 2211109. The next prime is 2211127. The reversal of 2211121 is 1211122.

2211121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2211121 - 2⁷ = 2210993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211098 and 2211107.

It is not an unprimeable number, because it can be changed into a prime (2211127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100495 + ... + 100516.

It is an arithmetic number, because the mean of its divisors is an integer number (603036).

2^2211121 is an apocalyptic number.

It is an amenable number.

2211121 is a deficient number, since it is larger than the sum of its proper divisors (201023).

2211121 is a wasteful number, since it uses less digits than its factorization.

2211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201022.

The product of its digits is 8, while the sum is 10.

The square root of 2211121 is about 1486.9838600335. The cubic root of 2211121 is about 130.2779261103.

Adding to 2211121 its reverse (1211122), we get a palindrome (3422243).

Subtracting from 2211121 its reverse (1211122), we obtain a palindrome (999999).

It can be divided in two parts, 2211 and 121, that added together give a palindrome (2332).

The spelling of 2211121 in words is "two million, two hundred eleven thousand, one hundred twenty-one".