4001220441021 has 8 divisors (see below), whose sum is σ = 5337514431040. Its totient is φ = 2666203372512.

The previous prime is 4001220440993. The next prime is 4001220441067. The reversal of 4001220441021 is 1201440221004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4001220441021 - 2⁵ = 4001220440989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001220448021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319223065 + ... + 319235598.

It is an arithmetic number, because the mean of its divisors is an integer number (667189303880).

Almost surely, 2^{4001220441021} is an apocalyptic number.

It is an amenable number.

4001220441021 is a deficient number, since it is larger than the sum of its proper divisors (1336293990019).

4001220441021 is a wasteful number, since it uses less digits than its factorization.

4001220441021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638460755.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 4001220441021 its reverse (1201440221004), we get a palindrome (5202660662025).

The spelling of 4001220441021 in words is "four trillion, one billion, two hundred twenty million, four hundred forty-one thousand, twenty-one".