1201011011 has 2 divisors, whose sum is σ = 1201011012. Its totient is φ = 1201011010.

The previous prime is 1201011001. The next prime is 1201011043. The reversal of 1201011011 is 1101101021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201011011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201011011.

It is not a weakly prime, because it can be changed into another prime (1201011001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600505505 + 600505506.

It is an arithmetic number, because the mean of its divisors is an integer number (600505506).

Almost surely, 2^1201011011 is an apocalyptic number.

1201011011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201011011 is an equidigital number, since it uses as much as digits as its factorization.

1201011011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1201011011 is about 34655.6057658786. The cubic root of 1201011011 is about 1062.9569186061.

Adding to 1201011011 its reverse (1101101021), we get a palindrome (2302112032).

The spelling of 1201011011 in words is "one billion, two hundred one million, eleven thousand, eleven".