1021323443243 has 4 divisors (see below), whose sum is σ = 1056541493040. Its totient is φ = 986105393448.

The previous prime is 1021323443221. The next prime is 1021323443279. The reversal of 1021323443243 is 3423443231201.

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 1021323443243 - 2²⁰ = 1021322394667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021323443743) 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, 17609024855 + ... + 17609024912.

It is an arithmetic number, because the mean of its divisors is an integer number (264135373260).

Almost surely, 2^{1021323443243} is an apocalyptic number.

1021323443243 is a deficient number, since it is larger than the sum of its proper divisors (35218049797).

1021323443243 is an equidigital number, since it uses as much as digits as its factorization.

1021323443243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35218049796.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 1021323443243 its reverse (3423443231201), we get a palindrome (4444766674444).

The spelling of 1021323443243 in words is "one trillion, twenty-one billion, three hundred twenty-three million, four hundred forty-three thousand, two hundred forty-three".