11112222112111 has 2 divisors, whose sum is σ = 11112222112112. Its totient is φ = 11112222112110.

The previous prime is 11112222112073. The next prime is 11112222112127. The reversal of 11112222112111 is 11121122221111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11112222112111 - 2¹⁷ = 11112221981039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112222112181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556111056055 + 5556111056056.

It is an arithmetic number, because the mean of its divisors is an integer number (5556111056056).

Almost surely, 2^{11112222112111} is an apocalyptic number.

11112222112111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112222112111 is an equidigital number, since it uses as much as digits as its factorization.

11112222112111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 19.

Adding to 11112222112111 its reverse (11121122221111), we get a palindrome (22233344333222).

The spelling of 11112222112111 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twelve thousand, one hundred eleven".