43303122118021 has 2 divisors, whose sum is σ = 43303122118022. Its totient is φ = 43303122118020.

The previous prime is 43303122118019. The next prime is 43303122118097. The reversal of 43303122118021 is 12081122130334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42060088890625 + 1243033227396 = 6485375^2 + 1114914^2 .

It is a cyclic number.

It is not a de Polignac number, because 43303122118021 - 2¹ = 43303122118019 is a prime.

Together with 43303122118019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43303122118621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21651561059010 + 21651561059011.

It is an arithmetic number, because the mean of its divisors is an integer number (21651561059011).

Almost surely, 2^{43303122118021} is an apocalyptic number.

It is an amenable number.

43303122118021 is a deficient number, since it is larger than the sum of its proper divisors (1).

43303122118021 is an equidigital number, since it uses as much as digits as its factorization.

43303122118021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 43303122118021 its reverse (12081122130334), we get a palindrome (55384244248355).

The spelling of 43303122118021 in words is "forty-three trillion, three hundred three billion, one hundred twenty-two million, one hundred eighteen thousand, twenty-one".