1131111122111 has 2 divisors, whose sum is σ = 1131111122112. Its totient is φ = 1131111122110.

The previous prime is 1131111122039. The next prime is 1131111122123. The reversal of 1131111122111 is 1112211111311.

It is a m-pointer prime, because the next prime (1131111122123) can be obtained adding 1131111122111 to its product of digits (12).

It is a strong prime.

It is an emirp because it is prime and its reverse (1112211111311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131111122111 - 2¹⁰ = 1131111121087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131111122111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131111122161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565555561055 + 565555561056.

It is an arithmetic number, because the mean of its divisors is an integer number (565555561056).

Almost surely, 2^{1131111122111} is an apocalyptic number.

1131111122111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131111122111 is an equidigital number, since it uses as much as digits as its factorization.

1131111122111 is an evil number, because the sum of its binary digits is even.

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

Adding to 1131111122111 its reverse (1112211111311), we get a palindrome (2243322233422).

The spelling of 1131111122111 in words is "one trillion, one hundred thirty-one billion, one hundred eleven million, one hundred twenty-two thousand, one hundred eleven".