1323011111 has 4 divisors (see below), whose sum is σ = 1400835312. Its totient is φ = 1245186912.

The previous prime is 1323011093. The next prime is 1323011141. The reversal of 1323011111 is 1111103231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1323011111 - 2³⁰ = 249269287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323011141) 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 in 3 ways as a sum of consecutive naturals, for example, 38912075 + ... + 38912108.

It is an arithmetic number, because the mean of its divisors is an integer number (350208828).

Almost surely, 2^1323011111 is an apocalyptic number.

1323011111 is a deficient number, since it is larger than the sum of its proper divisors (77824201).

1323011111 is an equidigital number, since it uses as much as digits as its factorization.

1323011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77824200.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1323011111 is about 36373.2196952648. The cubic root of 1323011111 is about 1097.7947862066.

Adding to 1323011111 its reverse (1111103231), we get a palindrome (2434114342).

The spelling of 1323011111 in words is "one billion, three hundred twenty-three million, eleven thousand, one hundred eleven".