1366321111 has 2 divisors, whose sum is σ = 1366321112. Its totient is φ = 1366321110.

The previous prime is 1366321097. The next prime is 1366321123. The reversal of 1366321111 is 1111236631.

It is a strong prime.

It is an emirp because it is prime and its reverse (1111236631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1366321111 - 2²³ = 1357932503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1366321181) 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, 683160555 + 683160556.

It is an arithmetic number, because the mean of its divisors is an integer number (683160556).

Almost surely, 2^1366321111 is an apocalyptic number.

1366321111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366321111 is an equidigital number, since it uses as much as digits as its factorization.

1366321111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 1366321111 is about 36963.7810701232. The cubic root of 1366321111 is about 1109.6455083685.

Adding to 1366321111 its reverse (1111236631), we get a palindrome (2477557742).

The spelling of 1366321111 in words is "one billion, three hundred sixty-six million, three hundred twenty-one thousand, one hundred eleven".