4043240121 has 16 divisors (see below), whose sum is σ = 5413472960. Its totient is φ = 2684275200.

The previous prime is 4043240119. The next prime is 4043240129. The reversal of 4043240121 is 1210423404.

It is not a de Polignac number, because 4043240121 - 2¹ = 4043240119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4043240129) 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, 778110 + ... + 783288.

It is an arithmetic number, because the mean of its divisors is an integer number (338342060).

Almost surely, 2^4043240121 is an apocalyptic number.

It is an amenable number.

4043240121 is a deficient number, since it is larger than the sum of its proper divisors (1370232839).

4043240121 is a wasteful number, since it uses less digits than its factorization.

4043240121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 4043240121 is about 63586.4775011165. The cubic root of 4043240121 is about 1593.1005150457.

Adding to 4043240121 its reverse (1210423404), we get a palindrome (5253663525).

The spelling of 4043240121 in words is "four billion, forty-three million, two hundred forty thousand, one hundred twenty-one".