2144211121 has 4 divisors (see below), whose sum is σ = 2309150452. Its totient is φ = 1979271792.

The previous prime is 2144211109. The next prime is 2144211149. The reversal of 2144211121 is 1211124412.

It is a happy number.

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 1012830625 + 1131380496 = 31825^2 + 33636^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144211121 - 2⁷ = 2144210993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2144211151) 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, 82469646 + ... + 82469671.

It is an arithmetic number, because the mean of its divisors is an integer number (577287613).

Almost surely, 2^2144211121 is an apocalyptic number.

It is an amenable number.

2144211121 is a deficient number, since it is larger than the sum of its proper divisors (164939331).

2144211121 is a wasteful number, since it uses less digits than its factorization.

2144211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164939330.

The product of its digits is 128, while the sum is 19.

The square root of 2144211121 is about 46305.6273146148. The cubic root of 2144211121 is about 1289.5034687418.

Adding to 2144211121 its reverse (1211124412), we get a palindrome (3355335533).

The spelling of 2144211121 in words is "two billion, one hundred forty-four million, two hundred eleven thousand, one hundred twenty-one".