1121351543 has 4 divisors (see below), whose sum is σ = 1207609368. Its totient is φ = 1035093720.

The previous prime is 1121351537. The next prime is 1121351579. The reversal of 1121351543 is 3451531211.

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 1121351543 - 2⁶ = 1121351479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121351513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43128893 + ... + 43128918.

It is an arithmetic number, because the mean of its divisors is an integer number (301902342).

Almost surely, 2^1121351543 is an apocalyptic number.

1121351543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1121351543 is a deficient number, since it is larger than the sum of its proper divisors (86257825).

1121351543 is an equidigital number, since it uses as much as digits as its factorization.

1121351543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86257824.

The product of its digits is 1800, while the sum is 26.

The square root of 1121351543 is about 33486.5875090311. The cubic root of 1121351543 is about 1038.9163833488.

Adding to 1121351543 its reverse (3451531211), we get a palindrome (4572882754).

The spelling of 1121351543 in words is "one billion, one hundred twenty-one million, three hundred fifty-one thousand, five hundred forty-three".