1200120011 has 2 divisors, whose sum is σ = 1200120012. Its totient is φ = 1200120010.

The previous prime is 1200120007. The next prime is 1200120017. The reversal of 1200120011 is 1100210021.

It is a weak prime.

It is an emirp because it is prime and its reverse (1100210021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200120011 - 2² = 1200120007 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200120017) 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 as a sum of consecutive naturals, namely, 600060005 + 600060006.

It is an arithmetic number, because the mean of its divisors is an integer number (600060006).

Almost surely, 2^1200120011 is an apocalyptic number.

1200120011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200120011 is an equidigital number, since it uses as much as digits as its factorization.

1200120011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1200120011 is about 34642.7483176494. The cubic root of 1200120011 is about 1062.6939932010.

Adding to 1200120011 its reverse (1100210021), we get a palindrome (2300330032).

The spelling of 1200120011 in words is "one billion, two hundred million, one hundred twenty thousand, eleven".