111222100111 has 4 divisors (see below), whose sum is σ = 114809909824. Its totient is φ = 107634290400.

The previous prime is 111222100103. The next prime is 111222100141. The reversal of 111222100111 is 111001222111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111001222111 = 13 ⋅8538555547.

It is a cyclic number.

It is not a de Polignac number, because 111222100111 - 2³ = 111222100103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111222100091 and 111222100100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222100141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1793904810 + ... + 1793904871.

It is an arithmetic number, because the mean of its divisors is an integer number (28702477456).

Almost surely, 2^111222100111 is an apocalyptic number.

111222100111 is a deficient number, since it is larger than the sum of its proper divisors (3587809713).

111222100111 is an equidigital number, since it uses as much as digits as its factorization.

111222100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3587809712.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111222100111 its reverse (111001222111), we get a palindrome (222223322222).

The spelling of 111222100111 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred thousand, one hundred eleven".