4002042022221 has 4 divisors (see below), whose sum is σ = 5336056029632. Its totient is φ = 2668028014812.

The previous prime is 4002042022151. The next prime is 4002042022259. The reversal of 4002042022221 is 1222202402004.

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 not a de Polignac number, because 4002042022221 - 2⁹ = 4002042021709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002042022291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667007003701 + ... + 667007003706.

It is an arithmetic number, because the mean of its divisors is an integer number (1334014007408).

Almost surely, 2^{4002042022221} is an apocalyptic number.

It is an amenable number.

4002042022221 is a deficient number, since it is larger than the sum of its proper divisors (1334014007411).

4002042022221 is a wasteful number, since it uses less digits than its factorization.

4002042022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334014007410.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 4002042022221 its reverse (1222202402004), we get a palindrome (5224244424225).

The spelling of 4002042022221 in words is "four trillion, two billion, forty-two million, twenty-two thousand, two hundred twenty-one".