4021444423231 has 2 divisors, whose sum is σ = 4021444423232. Its totient is φ = 4021444423230.

The previous prime is 4021444423201. The next prime is 4021444423267. The reversal of 4021444423231 is 1323244441204.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021444423231 is a prime.

It is a super-2 number, since 2×4021444423231² (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 (4021444423201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722211615 + 2010722211616.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722211616).

Almost surely, 2^{4021444423231} is an apocalyptic number.

4021444423231 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444423231 is an equidigital number, since it uses as much as digits as its factorization.

4021444423231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 4021444423231 its reverse (1323244441204), we get a palindrome (5344688864435).

The spelling of 4021444423231 in words is "four trillion, twenty-one billion, four hundred forty-four million, four hundred twenty-three thousand, two hundred thirty-one".