1323211111 has 2 divisors, whose sum is σ = 1323211112. Its totient is φ = 1323211110.

The previous prime is 1323211079. The next prime is 1323211157. The reversal of 1323211111 is 1111123231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1323211111 - 2⁵ = 1323211079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323211171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661605555 + 661605556.

It is an arithmetic number, because the mean of its divisors is an integer number (661605556).

Almost surely, 2^1323211111 is an apocalyptic number.

1323211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323211111 is an equidigital number, since it uses as much as digits as its factorization.

1323211111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 16.

The square root of 1323211111 is about 36375.9688668220. The cubic root of 1323211111 is about 1097.8501014121.

Adding to 1323211111 its reverse (1111123231), we get a palindrome (2434334342).

The spelling of 1323211111 in words is "one billion, three hundred twenty-three million, two hundred eleven thousand, one hundred eleven".