2121443 has 2 divisors, whose sum is σ = 2121444. Its totient is φ = 2121442.

The previous prime is 2121433. The next prime is 2121461. The reversal of 2121443 is 3441212.

2121443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121443 - 2⁸ = 2121187 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060721 + 1060722.

It is an arithmetic number, because the mean of its divisors is an integer number (1060722).

2^2121443 is an apocalyptic number.

2121443 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121443 is an equidigital number, since it uses as much as digits as its factorization.

2121443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 17.

The square root of 2121443 is about 1456.5174217976. The cubic root of 2121443 is about 128.4923057564.

Adding to 2121443 its reverse (3441212), we get a palindrome (5562655).

The spelling of 2121443 in words is "two million, one hundred twenty-one thousand, four hundred forty-three".