2121433550543 has 4 divisors (see below), whose sum is σ = 2233087947960. Its totient is φ = 2009779153128.

The previous prime is 2121433550503. The next prime is 2121433550591. The reversal of 2121433550543 is 3450553341212.

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 2121433550543 - 2³⁰ = 2120359808719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121433550497 and 2121433550506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121433550503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55827198680 + ... + 55827198717.

It is an arithmetic number, because the mean of its divisors is an integer number (558271986990).

Almost surely, 2^{2121433550543} is an apocalyptic number.

2121433550543 is a deficient number, since it is larger than the sum of its proper divisors (111654397417).

2121433550543 is a wasteful number, since it uses less digits than its factorization.

2121433550543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111654397416.

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 2121433550543 its reverse (3450553341212), we get a palindrome (5571986891755).

The spelling of 2121433550543 in words is "two trillion, one hundred twenty-one billion, four hundred thirty-three million, five hundred fifty thousand, five hundred forty-three".