4043220233021 has 2 divisors, whose sum is σ = 4043220233022. Its totient is φ = 4043220233020.

The previous prime is 4043220233009. The next prime is 4043220233057. The reversal of 4043220233021 is 1203320223404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2117825325625 + 1925394907396 = 1455275^2 + 1387586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4043220233021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4043220283021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021610116510 + 2021610116511.

It is an arithmetic number, because the mean of its divisors is an integer number (2021610116511).

Almost surely, 2^{4043220233021} is an apocalyptic number.

It is an amenable number.

4043220233021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4043220233021 is an equidigital number, since it uses as much as digits as its factorization.

4043220233021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 4043220233021 its reverse (1203320223404), we get a palindrome (5246540456425).

The spelling of 4043220233021 in words is "four trillion, forty-three billion, two hundred twenty million, two hundred thirty-three thousand, twenty-one".