111112001111 has 4 divisors (see below), whose sum is σ = 112634083392. Its totient is φ = 109589918832.

The previous prime is 111112001107. The next prime is 111112001129. The reversal of 111112001111 is 111100211111.

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: 111100211111 = 104869 ⋅1059419.

It is a cyclic number.

It is not a de Polignac number, because 111112001111 - 2² = 111112001107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111112001092 and 111112001101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112001101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 761041031 + ... + 761041176.

It is an arithmetic number, because the mean of its divisors is an integer number (28158520848).

Almost surely, 2^111112001111 is an apocalyptic number.

111112001111 is a deficient number, since it is larger than the sum of its proper divisors (1522082281).

111112001111 is an equidigital number, since it uses as much as digits as its factorization.

111112001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522082280.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 111112001111 its reverse (111100211111), we get a palindrome (222212212222).

The spelling of 111112001111 in words is "one hundred eleven billion, one hundred twelve million, one thousand, one hundred eleven".