1101111443 has 2 divisors, whose sum is σ = 1101111444. Its totient is φ = 1101111442.

The previous prime is 1101111439. The next prime is 1101111491. The reversal of 1101111443 is 3441111011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1101111443 - 2² = 1101111439 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101111343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550555721 + 550555722.

It is an arithmetic number, because the mean of its divisors is an integer number (550555722).

Almost surely, 2^1101111443 is an apocalyptic number.

1101111443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101111443 is an equidigital number, since it uses as much as digits as its factorization.

1101111443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 1101111443 is about 33182.9993068740. Note that the first 3 decimals coincide. The cubic root of 1101111443 is about 1032.6276713068.

Adding to 1101111443 its reverse (3441111011), we get a palindrome (4542222454).

The spelling of 1101111443 in words is "one billion, one hundred one million, one hundred eleven thousand, four hundred forty-three".