2321121121 has 4 divisors (see below), whose sum is σ = 2532132144. Its totient is φ = 2110110100.

The previous prime is 2321121119. The next prime is 2321121161. The reversal of 2321121121 is 1211211232.

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 2321121121 - 2¹ = 2321121119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2321121095 and 2321121104.

It is not an unprimeable number, because it can be changed into a prime (2321121161) 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 3 ways as a sum of consecutive naturals, for example, 105505495 + ... + 105505516.

It is an arithmetic number, because the mean of its divisors is an integer number (633033036).

Almost surely, 2^2321121121 is an apocalyptic number.

It is an amenable number.

2321121121 is a deficient number, since it is larger than the sum of its proper divisors (211011023).

2321121121 is a wasteful number, since it uses less digits than its factorization.

2321121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211011022.

The product of its digits is 48, while the sum is 16.

The square root of 2321121121 is about 48178.0149134437. The cubic root of 2321121121 is about 1324.0343971814.

Adding to 2321121121 its reverse (1211211232), we get a palindrome (3532332353).

It can be divided in two parts, 23211211 and 21, that added together give a palindrome (23211232).

The spelling of 2321121121 in words is "two billion, three hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".