4042143021 has 32 divisors (see below), whose sum is σ = 6351740928. Its totient is φ = 2238647040.

The previous prime is 4042142971. The next prime is 4042143037. The reversal of 4042143021 is 1203412404.

It is not a de Polignac number, because 4042143021 - 2¹⁴ = 4042126637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042143071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81781 + ... + 121541.

It is an arithmetic number, because the mean of its divisors is an integer number (198491904).

Almost surely, 2^4042143021 is an apocalyptic number.

It is an amenable number.

4042143021 is a deficient number, since it is larger than the sum of its proper divisors (2309597907).

4042143021 is a wasteful number, since it uses less digits than its factorization.

4042143021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39921.

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

The square root of 4042143021 is about 63577.8500816125. The cubic root of 4042143021 is about 1592.9564104308.

Adding to 4042143021 its reverse (1203412404), we get a palindrome (5245555425).

The spelling of 4042143021 in words is "four billion, forty-two million, one hundred forty-three thousand, twenty-one".