4021442441309 has 2 divisors, whose sum is σ = 4021442441310. Its totient is φ = 4021442441308.

The previous prime is 4021442441297. The next prime is 4021442441353. The reversal of 4021442441309 is 9031442441204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3830154298084 + 191288143225 = 1957078^2 + 437365^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021442441309 - 2¹² = 4021442437213 is a prime.

It is a super-2 number, since 2×4021442441309² (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 (4021442441389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010721220654 + 2010721220655.

It is an arithmetic number, because the mean of its divisors is an integer number (2010721220655).

Almost surely, 2^{4021442441309} is an apocalyptic number.

It is an amenable number.

4021442441309 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021442441309 is an equidigital number, since it uses as much as digits as its factorization.

4021442441309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 4021442441309 in words is "four trillion, twenty-one billion, four hundred forty-two million, four hundred forty-one thousand, three hundred nine".