2121043043 has 4 divisors (see below), whose sum is σ = 2424049200. Its totient is φ = 1818036888.

The previous prime is 2121043027. The next prime is 2121043061. The reversal of 2121043043 is 3403401212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121043043 - 2⁴ = 2121043027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121043013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151503068 + ... + 151503081.

It is an arithmetic number, because the mean of its divisors is an integer number (606012300).

Almost surely, 2^2121043043 is an apocalyptic number.

2121043043 is a deficient number, since it is larger than the sum of its proper divisors (303006157).

2121043043 is an equidigital number, since it uses as much as digits as its factorization.

2121043043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303006156.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2121043043 is about 46054.7830632172. The cubic root of 2121043043 is about 1284.8423033681.

Adding to 2121043043 its reverse (3403401212), we get a palindrome (5524444255).

The spelling of 2121043043 in words is "two billion, one hundred twenty-one million, forty-three thousand, forty-three".