4021443331397 has 2 divisors, whose sum is σ = 4021443331398. Its totient is φ = 4021443331396.

The previous prime is 4021443331369. The next prime is 4021443331483. The reversal of 4021443331397 is 7931333441204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3948828711556 + 72614619841 = 1987166^2 + 269471^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021443331397 - 2⁶ = 4021443331333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021443331357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010721665698 + 2010721665699.

It is an arithmetic number, because the mean of its divisors is an integer number (2010721665699).

Almost surely, 2^{4021443331397} is an apocalyptic number.

It is an amenable number.

4021443331397 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021443331397 is an equidigital number, since it uses as much as digits as its factorization.

4021443331397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 44.

The spelling of 4021443331397 in words is "four trillion, twenty-one billion, four hundred forty-three million, three hundred thirty-one thousand, three hundred ninety-seven".