43204022021 has 2 divisors, whose sum is σ = 43204022022. Its totient is φ = 43204022020.

The previous prime is 43204022009. The next prime is 43204022039. The reversal of 43204022021 is 12022040234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35439945025 + 7764076996 = 188255^2 + 88114^2 .

It is a cyclic number.

It is not a de Polignac number, because 43204022021 - 2³⁴ = 26024152837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43204021984 and 43204022002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43204022821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21602011010 + 21602011011.

It is an arithmetic number, because the mean of its divisors is an integer number (21602011011).

Almost surely, 2^43204022021 is an apocalyptic number.

It is an amenable number.

43204022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

43204022021 is an equidigital number, since it uses as much as digits as its factorization.

43204022021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 43204022021 its reverse (12022040234), we get a palindrome (55226062255).

The spelling of 43204022021 in words is "forty-three billion, two hundred four million, twenty-two thousand, twenty-one".