2112331121 has 4 divisors (see below), whose sum is σ = 2123053812. Its totient is φ = 2101608432.

The previous prime is 2112331093. The next prime is 2112331127. The reversal of 2112331121 is 1211332112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1652829025 + 459502096 = 40655^2 + 21436^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112331121 - 2⁶ = 2112331057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112331121.

It is not an unprimeable number, because it can be changed into a prime (2112331127) 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, 5361050 + ... + 5361443.

It is an arithmetic number, because the mean of its divisors is an integer number (530763453).

Almost surely, 2^2112331121 is an apocalyptic number.

It is an amenable number.

2112331121 is a deficient number, since it is larger than the sum of its proper divisors (10722691).

2112331121 is a wasteful number, since it uses less digits than its factorization.

2112331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10722690.

The product of its digits is 72, while the sum is 17.

The square root of 2112331121 is about 45960.1035790826. The cubic root of 2112331121 is about 1283.0807791243.

Adding to 2112331121 its reverse (1211332112), we get a palindrome (3323663233).

Subtracting from 2112331121 its reverse (1211332112), we obtain a palindrome (900999009).

It can be divided in two parts, 211 and 2331121, that added together give a palindrome (2331332).

The spelling of 2112331121 in words is "two billion, one hundred twelve million, three hundred thirty-one thousand, one hundred twenty-one".