2111121 has 12 divisors (see below), whose sum is σ = 3075072. Its totient is φ = 1395576.

The previous prime is 2111107. The next prime is 2111129. The reversal of 2111121 is 1211112.

It is a happy number.

It is not a de Polignac number, because 2111121 - 2⁵ = 2111089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

2111121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2111129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220 + ... + 2066.

It is an arithmetic number, because the mean of its divisors is an integer number (256256).

2^2111121 is an apocalyptic number.

It is an amenable number.

2111121 is a deficient number, since it is larger than the sum of its proper divisors (963951).

2111121 is a wasteful number, since it uses less digits than its factorization.

2111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980 (or 1977 counting only the distinct ones).

The product of its digits is 4, while the sum is 9.

The square root of 2111121 is about 1452.9697175096. The cubic root of 2111121 is about 128.2835713444.

Adding to 2111121 its reverse (1211112), we get a palindrome (3322233).

Subtracting from 2111121 its reverse (1211112), we obtain a palindrome (900009).

The spelling of 2111121 in words is "two million, one hundred eleven thousand, one hundred twenty-one".