2121343220443 has 2 divisors, whose sum is σ = 2121343220444. Its totient is φ = 2121343220442.

The previous prime is 2121343220419. The next prime is 2121343220527. The reversal of 2121343220443 is 3440223431212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121343220443 - 2⁵ = 2121343220411 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121343229443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060671610221 + 1060671610222.

It is an arithmetic number, because the mean of its divisors is an integer number (1060671610222).

Almost surely, 2^{2121343220443} is an apocalyptic number.

2121343220443 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121343220443 is an equidigital number, since it uses as much as digits as its factorization.

2121343220443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 2121343220443 its reverse (3440223431212), we get a palindrome (5561566651655).

The spelling of 2121343220443 in words is "two trillion, one hundred twenty-one billion, three hundred forty-three million, two hundred twenty thousand, four hundred forty-three".