11311112323111 has 2 divisors, whose sum is σ = 11311112323112. Its totient is φ = 11311112323110.

The previous prime is 11311112323103. The next prime is 11311112323117. The reversal of 11311112323111 is 11132321111311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11311112323111 - 2³ = 11311112323103 is a prime.

It is a super-3 number, since 3×11311112323111³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11311112323117) 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, 5655556161555 + 5655556161556.

It is an arithmetic number, because the mean of its divisors is an integer number (5655556161556).

Almost surely, 2^{11311112323111} is an apocalyptic number.

11311112323111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311112323111 is an equidigital number, since it uses as much as digits as its factorization.

11311112323111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 22.

Adding to 11311112323111 its reverse (11132321111311), we get a palindrome (22443433434422).

The spelling of 11311112323111 in words is "eleven trillion, three hundred eleven billion, one hundred twelve million, three hundred twenty-three thousand, one hundred eleven".