111121222111 has 8 divisors (see below), whose sum is σ = 112213236960. Its totient is φ = 110031113472.

The previous prime is 111121222067. The next prime is 111121222123. The reversal of 111121222111 is 111222121111.

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 111121222111 - 2⁷ = 111121221983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121222141) 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, 359251 + ... + 592708.

It is an arithmetic number, because the mean of its divisors is an integer number (14026654620).

Almost surely, 2^111121222111 is an apocalyptic number.

111121222111 is a deficient number, since it is larger than the sum of its proper divisors (1092014849).

111121222111 is a wasteful number, since it uses less digits than its factorization.

111121222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953105.

The product of its digits is 16, while the sum is 16.

Adding to 111121222111 its reverse (111222121111), we get a palindrome (222343343222).

The spelling of 111121222111 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".