2144664121 has 16 divisors (see below), whose sum is σ = 2448653760. Its totient is φ = 1865617920.

The previous prime is 2144664107. The next prime is 2144664139. The reversal of 2144664121 is 1214664412.

It is a cyclic number.

It is not a de Polignac number, because 2144664121 - 2¹¹ = 2144662073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2144664161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67731 + ... + 94216.

It is an arithmetic number, because the mean of its divisors is an integer number (153040860).

Almost surely, 2^2144664121 is an apocalyptic number.

It is an amenable number.

2144664121 is a deficient number, since it is larger than the sum of its proper divisors (303989639).

2144664121 is a wasteful number, since it uses less digits than its factorization.

2144664121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162024.

The product of its digits is 9216, while the sum is 31.

The square root of 2144664121 is about 46310.5184704296. The cubic root of 2144664121 is about 1289.5942719800.

The spelling of 2144664121 in words is "two billion, one hundred forty-four million, six hundred sixty-four thousand, one hundred twenty-one".