1131543221343 has 4 divisors (see below), whose sum is σ = 1508724295128. Its totient is φ = 754362147560.

The previous prime is 1131543221323. The next prime is 1131543221387. The reversal of 1131543221343 is 3431223451311.

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 1131543221343 - 2¹⁶ = 1131543155807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131543221323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188590536888 + ... + 188590536893.

It is an arithmetic number, because the mean of its divisors is an integer number (377181073782).

Almost surely, 2^{1131543221343} is an apocalyptic number.

1131543221343 is a deficient number, since it is larger than the sum of its proper divisors (377181073785).

1131543221343 is an equidigital number, since it uses as much as digits as its factorization.

1131543221343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377181073784.

The product of its digits is 25920, while the sum is 33.

Adding to 1131543221343 its reverse (3431223451311), we get a palindrome (4562766672654).

The spelling of 1131543221343 in words is "one trillion, one hundred thirty-one billion, five hundred forty-three million, two hundred twenty-one thousand, three hundred forty-three".