43120052321 has 2 divisors, whose sum is σ = 43120052322. Its totient is φ = 43120052320.

The previous prime is 43120052281. The next prime is 43120052363. The reversal of 43120052321 is 12325002134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43030938721 + 89113600 = 207439^2 + 9440^2 .

It is a cyclic number.

It is not a de Polignac number, because 43120052321 - 2⁶ = 43120052257 is a prime.

It is not a weakly prime, because it can be changed into another prime (43120052021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21560026160 + 21560026161.

It is an arithmetic number, because the mean of its divisors is an integer number (21560026161).

Almost surely, 2^43120052321 is an apocalyptic number.

It is an amenable number.

43120052321 is a deficient number, since it is larger than the sum of its proper divisors (1).

43120052321 is an equidigital number, since it uses as much as digits as its factorization.

43120052321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 43120052321 its reverse (12325002134), we get a palindrome (55445054455).

The spelling of 43120052321 in words is "forty-three billion, one hundred twenty million, fifty-two thousand, three hundred twenty-one".