1113121112111 has 2 divisors, whose sum is σ = 1113121112112. Its totient is φ = 1113121112110.

The previous prime is 1113121112069. The next prime is 1113121112123. The reversal of 1113121112111 is 1112111213111.

It is a m-pointer prime, because the next prime (1113121112123) can be obtained adding 1113121112111 to its product of digits (12).

It is a strong prime.

It is an emirp because it is prime and its reverse (1112111213111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1113121112111 - 2²⁶ = 1113054003247 is a prime.

It is a super-2 number, since 2×1113121112111² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1113121112111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113121112711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556560556055 + 556560556056.

It is an arithmetic number, because the mean of its divisors is an integer number (556560556056).

Almost surely, 2^{1113121112111} is an apocalyptic number.

1113121112111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113121112111 is an equidigital number, since it uses as much as digits as its factorization.

1113121112111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 17.

Adding to 1113121112111 its reverse (1112111213111), we get a palindrome (2225232325222).

The spelling of 1113121112111 in words is "one trillion, one hundred thirteen billion, one hundred twenty-one million, one hundred twelve thousand, one hundred eleven".