4021042143281 has 2 divisors, whose sum is σ = 4021042143282. Its totient is φ = 4021042143280.

The previous prime is 4021042143257. The next prime is 4021042143331. The reversal of 4021042143281 is 1823412401204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3783351767056 + 237690376225 = 1945084^2 + 487535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021042143281 is a prime.

It is a super-2 number, since 2×4021042143281² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4021042113281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010521071640 + 2010521071641.

It is an arithmetic number, because the mean of its divisors is an integer number (2010521071641).

Almost surely, 2^{4021042143281} is an apocalyptic number.

It is an amenable number.

4021042143281 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021042143281 is an equidigital number, since it uses as much as digits as its factorization.

4021042143281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 32.

Adding to 4021042143281 its reverse (1823412401204), we get a palindrome (5844454544485).

The spelling of 4021042143281 in words is "four trillion, twenty-one billion, forty-two million, one hundred forty-three thousand, two hundred eighty-one".