43120052021 has 2 divisors, whose sum is σ = 43120052022. Its totient is φ = 43120052020.

The previous prime is 43120051957. The next prime is 43120052047. The reversal of 43120052021 is 12025002134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25756719121 + 17363332900 = 160489^2 + 131770^2 .

It is a cyclic number.

It is not a de Polignac number, because 43120052021 - 2⁶ = 43120051957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43120051984 and 43120052002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43120052321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21560026010 + 21560026011.

It is an arithmetic number, because the mean of its divisors is an integer number (21560026011).

Almost surely, 2^43120052021 is an apocalyptic number.

It is an amenable number.

43120052021 is a deficient number, since it is larger than the sum of its proper divisors (1).

43120052021 is an equidigital number, since it uses as much as digits as its factorization.

43120052021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 43120052021 its reverse (12025002134), we get a palindrome (55145054155).

The spelling of 43120052021 in words is "forty-three billion, one hundred twenty million, fifty-two thousand, twenty-one".