1211230711 has 2 divisors, whose sum is σ = 1211230712. Its totient is φ = 1211230710.

The previous prime is 1211230697. The next prime is 1211230717. The reversal of 1211230711 is 1170321121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211230711 - 2⁷ = 1211230583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211230717) 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, 605615355 + 605615356.

It is an arithmetic number, because the mean of its divisors is an integer number (605615356).

Almost surely, 2^1211230711 is an apocalyptic number.

1211230711 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211230711 is an equidigital number, since it uses as much as digits as its factorization.

1211230711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 1211230711 is about 34802.7399927075. The cubic root of 1211230711 is about 1065.9633948971.

Adding to 1211230711 its reverse (1170321121), we get a palindrome (2381551832).

The spelling of 1211230711 in words is "one billion, two hundred eleven million, two hundred thirty thousand, seven hundred eleven".