43321220343113 has 2 divisors, whose sum is σ = 43321220343114. Its totient is φ = 43321220343112.

The previous prime is 43321220343073. The next prime is 43321220343131. The reversal of 43321220343113 is 31134302212334.

Together with next prime (43321220343131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39491320460944 + 3829899882169 = 6284212^2 + 1957013^2 .

It is a cyclic number.

It is not a de Polignac number, because 43321220343113 - 2³⁰ = 43320146601289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43321220343113.

It is not a weakly prime, because it can be changed into another prime (43321220343133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21660610171556 + 21660610171557.

It is an arithmetic number, because the mean of its divisors is an integer number (21660610171557).

Almost surely, 2^{43321220343113} is an apocalyptic number.

It is an amenable number.

43321220343113 is a deficient number, since it is larger than the sum of its proper divisors (1).

43321220343113 is an equidigital number, since it uses as much as digits as its factorization.

43321220343113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 43321220343113 its reverse (31134302212334), we get a palindrome (74455522555447).

The spelling of 43321220343113 in words is "forty-three trillion, three hundred twenty-one billion, two hundred twenty million, three hundred forty-three thousand, one hundred thirteen".