1331323111 has 2 divisors, whose sum is σ = 1331323112. Its totient is φ = 1331323110.

The previous prime is 1331323087. The next prime is 1331323121. The reversal of 1331323111 is 1113231331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331323111 - 2²⁹ = 794452199 is a prime.

It is a super-3 number, since 3×1331323111³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331323121) 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, 665661555 + 665661556.

It is an arithmetic number, because the mean of its divisors is an integer number (665661556).

Almost surely, 2^1331323111 is an apocalyptic number.

1331323111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331323111 is an equidigital number, since it uses as much as digits as its factorization.

1331323111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162, while the sum is 19.

The square root of 1331323111 is about 36487.3006811959. The cubic root of 1331323111 is about 1100.0890040930.

Adding to 1331323111 its reverse (1113231331), we get a palindrome (2444554442).

The spelling of 1331323111 in words is "one billion, three hundred thirty-one million, three hundred twenty-three thousand, one hundred eleven".