4043042042121 has 6 divisors (see below), whose sum is σ = 5839949616410. Its totient is φ = 2695361361408.

The previous prime is 4043042042111. The next prime is 4043042042141. The reversal of 4043042042121 is 1212402403404.

4043042042121 is a `hidden beast` number, since 4 + 0 + 430 + 4 + 204 + 2 + 1 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2621844262521 + 1421197779600 = 1619211^2 + 1192140^2 .

It is not a de Polignac number, because 4043042042121 - 2⁶ = 4043042042057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4043042042101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 224613446776 + ... + 224613446793.

Almost surely, 2^{4043042042121} is an apocalyptic number.

It is an amenable number.

4043042042121 is a deficient number, since it is larger than the sum of its proper divisors (1796907574289).

4043042042121 is a wasteful number, since it uses less digits than its factorization.

4043042042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449226893575 (or 449226893572 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 4043042042121 its reverse (1212402403404), we get a palindrome (5255444445525).

The spelling of 4043042042121 in words is "four trillion, forty-three billion, forty-two million, forty-two thousand, one hundred twenty-one".