1121711611 has 2 divisors, whose sum is σ = 1121711612. Its totient is φ = 1121711610.

The previous prime is 1121711609. The next prime is 1121711621. The reversal of 1121711611 is 1161171211.

It is a weak prime.

It is an emirp because it is prime and its reverse (1161171211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121711611 - 2¹ = 1121711609 is a prime.

Together with 1121711609, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1121711621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560855805 + 560855806.

It is an arithmetic number, because the mean of its divisors is an integer number (560855806).

Almost surely, 2^1121711611 is an apocalyptic number.

1121711611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121711611 is an equidigital number, since it uses as much as digits as its factorization.

1121711611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 22.

The square root of 1121711611 is about 33491.9633792944. The cubic root of 1121711611 is about 1039.0275707561.

Adding to 1121711611 its reverse (1161171211), we get a palindrome (2282882822).

The spelling of 1121711611 in words is "one billion, one hundred twenty-one million, seven hundred eleven thousand, six hundred eleven".