4021444101391 has 2 divisors, whose sum is σ = 4021444101392. Its totient is φ = 4021444101390.

The previous prime is 4021444101377. The next prime is 4021444101473. The reversal of 4021444101391 is 1931014441204.

4021444101391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4021444101391 - 2⁷ = 4021444101263 is a prime.

It is a super-2 number, since 2×4021444101391² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021444105391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722050695 + 2010722050696.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722050696).

Almost surely, 2^{4021444101391} is an apocalyptic number.

4021444101391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444101391 is an equidigital number, since it uses as much as digits as its factorization.

4021444101391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

Adding to 4021444101391 its reverse (1931014441204), we get a palindrome (5952458542595).

The spelling of 4021444101391 in words is "four trillion, twenty-one billion, four hundred forty-four million, one hundred one thousand, three hundred ninety-one".