4021042040421 has 16 divisors (see below), whose sum is σ = 6211237805184. Its totient is φ = 2266262440704.

The previous prime is 4021042040401. The next prime is 4021042040447. The reversal of 4021042040421 is 1240402401204.

It is not a de Polignac number, because 4021042040421 - 2⁶ = 4021042040357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4021042040391 and 4021042040400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021042040401) 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 15 ways as a sum of consecutive naturals, for example, 1311492936 + ... + 1311496001.

It is an arithmetic number, because the mean of its divisors is an integer number (388202362824).

Almost surely, 2^{4021042040421} is an apocalyptic number.

It is an amenable number.

4021042040421 is a deficient number, since it is larger than the sum of its proper divisors (2190195764763).

4021042040421 is a wasteful number, since it uses less digits than its factorization.

4021042040421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622989020.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 4021042040421 its reverse (1240402401204), we get a palindrome (5261444441625).

The spelling of 4021042040421 in words is "four trillion, twenty-one billion, forty-two million, forty thousand, four hundred twenty-one".