1121121243543 has 8 divisors (see below), whose sum is σ = 1708375228288. Its totient is φ = 640640710584.

The previous prime is 1121121243527. The next prime is 1121121243553. The reversal of 1121121243543 is 3453421211211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121121243543 - 2⁴ = 1121121243527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121121243543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121121243553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26693362921 + ... + 26693362962.

It is an arithmetic number, because the mean of its divisors is an integer number (213546903536).

Almost surely, 2^{1121121243543} is an apocalyptic number.

1121121243543 is a deficient number, since it is larger than the sum of its proper divisors (587253984745).

1121121243543 is an equidigital number, since it uses as much as digits as its factorization.

1121121243543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53386725893.

The product of its digits is 5760, while the sum is 30.

Adding to 1121121243543 its reverse (3453421211211), we get a palindrome (4574542454754).

The spelling of 1121121243543 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred forty-three thousand, five hundred forty-three".