2121444043 has 4 divisors (see below), whose sum is σ = 2121770320. Its totient is φ = 2121117768.

The previous prime is 2121444023. The next prime is 2121444053. The reversal of 2121444043 is 3404441212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121444043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121443999 and 2121444017.

It is not an unprimeable number, because it can be changed into a prime (2121444023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153183 + ... + 166456.

It is an arithmetic number, because the mean of its divisors is an integer number (530442580).

Almost surely, 2^2121444043 is an apocalyptic number.

2121444043 is a deficient number, since it is larger than the sum of its proper divisors (326277).

2121444043 is an equidigital number, since it uses as much as digits as its factorization.

2121444043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326276.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 2121444043 is about 46059.1363683689. The cubic root of 2121444043 is about 1284.9232681399.

Adding to 2121444043 its reverse (3404441212), we get a palindrome (5525885255).

The spelling of 2121444043 in words is "two billion, one hundred twenty-one million, four hundred forty-four thousand, forty-three".