1121133443 has 4 divisors (see below), whose sum is σ = 1121607480. Its totient is φ = 1120659408.

The previous prime is 1121133439. The next prime is 1121133449. The reversal of 1121133443 is 3443311211.

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 1121133443 - 2² = 1121133439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121133449) 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 3 ways as a sum of consecutive naturals, for example, 233453 + ... + 238206.

It is an arithmetic number, because the mean of its divisors is an integer number (280401870).

Almost surely, 2^1121133443 is an apocalyptic number.

1121133443 is a deficient number, since it is larger than the sum of its proper divisors (474037).

1121133443 is an equidigital number, since it uses as much as digits as its factorization.

1121133443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474036.

The product of its digits is 864, while the sum is 23.

The square root of 1121133443 is about 33483.3308229632. The cubic root of 1121133443 is about 1038.8490234573.

Adding to 1121133443 its reverse (3443311211), we get a palindrome (4564444654).

It can be divided in two parts, 11211 and 33443, that multiplied together give a palindrome (374929473).

The spelling of 1121133443 in words is "one billion, one hundred twenty-one million, one hundred thirty-three thousand, four hundred forty-three".