1116121843 has 2 divisors, whose sum is σ = 1116121844. Its totient is φ = 1116121842.

The previous prime is 1116121841. The next prime is 1116121871. The reversal of 1116121843 is 3481216111.

It is an a-pointer prime, because the next prime (1116121871) can be obtained adding 1116121843 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1116121843 - 2¹ = 1116121841 is a prime.

Together with 1116121841, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1116121841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558060921 + 558060922.

It is an arithmetic number, because the mean of its divisors is an integer number (558060922).

Almost surely, 2^1116121843 is an apocalyptic number.

1116121843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116121843 is an equidigital number, since it uses as much as digits as its factorization.

1116121843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 28.

The square root of 1116121843 is about 33408.4097646087. The cubic root of 1116121843 is about 1037.2987849587.

Adding to 1116121843 its reverse (3481216111), we get a palindrome (4597337954).

The spelling of 1116121843 in words is "one billion, one hundred sixteen million, one hundred twenty-one thousand, eight hundred forty-three".