2105121050443 has 2 divisors, whose sum is σ = 2105121050444. Its totient is φ = 2105121050442.

The previous prime is 2105121050423. The next prime is 2105121050467. The reversal of 2105121050443 is 3440501215012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105121050443 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105121050423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052560525221 + 1052560525222.

It is an arithmetic number, because the mean of its divisors is an integer number (1052560525222).

Almost surely, 2^{2105121050443} is an apocalyptic number.

2105121050443 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105121050443 is an equidigital number, since it uses as much as digits as its factorization.

2105121050443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 2105121050443 its reverse (3440501215012), we get a palindrome (5545622265455).

The spelling of 2105121050443 in words is "two trillion, one hundred five billion, one hundred twenty-one million, fifty thousand, four hundred forty-three".