4021444134391 has 8 divisors (see below), whose sum is σ = 4029763510800. Its totient is φ = 4013126400960.

The previous prime is 4021444134377. The next prime is 4021444134403. The reversal of 4021444134391 is 1934314441204.

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

It is a cyclic number.

It is not a de Polignac number, because 4021444134391 - 2⁷ = 4021444134263 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 (4021444134361) 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, 4551531 + ... + 5362771.

It is an arithmetic number, because the mean of its divisors is an integer number (503720438850).

Almost surely, 2^{4021444134391} is an apocalyptic number.

4021444134391 is a deficient number, since it is larger than the sum of its proper divisors (8319376409).

4021444134391 is an equidigital number, since it uses as much as digits as its factorization.

4021444134391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821489.

The product of its (nonzero) digits is 165888, while the sum is 40.

Adding to 4021444134391 its reverse (1934314441204), we get a palindrome (5955758575595).

The spelling of 4021444134391 in words is "four trillion, twenty-one billion, four hundred forty-four million, one hundred thirty-four thousand, three hundred ninety-one".