1211310011 has 2 divisors, whose sum is σ = 1211310012. Its totient is φ = 1211310010.

The previous prime is 1211310007. The next prime is 1211310031. The reversal of 1211310011 is 1100131121.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1100131121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211310011 - 2² = 1211310007 is a prime.

It is a super-3 number, since 3×1211310011³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211309974 and 1211310001.

It is not a weakly prime, because it can be changed into another prime (1211310031) 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, 605655005 + 605655006.

It is an arithmetic number, because the mean of its divisors is an integer number (605655006).

Almost surely, 2^1211310011 is an apocalyptic number.

1211310011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211310011 is an equidigital number, since it uses as much as digits as its factorization.

1211310011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1211310011 is about 34803.8792521753. The cubic root of 1211310011 is about 1065.9866574767.

Adding to 1211310011 its reverse (1100131121), we get a palindrome (2311441132).

The spelling of 1211310011 in words is "one billion, two hundred eleven million, three hundred ten thousand, eleven".