111001121111 has 8 divisors (see below), whose sum is σ = 116851615920. Its totient is φ = 105151459392.

The previous prime is 111001121071. The next prime is 111001121131. The reversal of 111001121111 is 111121100111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111001121111 - 2¹⁸ = 111000858967 is a prime.

It is a super-3 number, since 3×111001121111³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111001121092 and 111001121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001121131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75131 + ... + 477123.

It is an arithmetic number, because the mean of its divisors is an integer number (14606451990).

Almost surely, 2^111001121111 is an apocalyptic number.

111001121111 is a deficient number, since it is larger than the sum of its proper divisors (5850494809).

111001121111 is a wasteful number, since it uses less digits than its factorization.

111001121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416545.

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

Adding to 111001121111 its reverse (111121100111), we get a palindrome (222122221222).

The spelling of 111001121111 in words is "one hundred eleven billion, one million, one hundred twenty-one thousand, one hundred eleven".