4043142221 has 4 divisors (see below), whose sum is σ = 4255939200. Its totient is φ = 3830345244.

The previous prime is 4043142199. The next prime is 4043142287. The reversal of 4043142221 is 1222413404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4043142221 - 2³⁰ = 2969400397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4043142821) 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 3 ways as a sum of consecutive naturals, for example, 106398461 + ... + 106398498.

It is an arithmetic number, because the mean of its divisors is an integer number (1063984800).

Almost surely, 2^4043142221 is an apocalyptic number.

It is an amenable number.

4043142221 is a deficient number, since it is larger than the sum of its proper divisors (212796979).

4043142221 is a wasteful number, since it uses less digits than its factorization.

4043142221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212796978.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 4043142221 is about 63585.7076786914. The cubic root of 4043142221 is about 1593.0876568928.

Adding to 4043142221 its reverse (1222413404), we get a palindrome (5265555625).

The spelling of 4043142221 in words is "four billion, forty-three million, one hundred forty-two thousand, two hundred twenty-one".