111221110121 has 8 divisors (see below), whose sum is σ = 121426118688. Its totient is φ = 101031768000.

The previous prime is 111221110079. The next prime is 111221110181. The reversal of 111221110121 is 121011122111.

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 111221110121 - 2¹⁸ = 111220847977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221110096 and 111221110105.

It is not an unprimeable number, because it can be changed into a prime (111221110181) 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, 3901760 + ... + 3930161.

It is an arithmetic number, because the mean of its divisors is an integer number (15178264836).

Almost surely, 2^111221110121 is an apocalyptic number.

111221110121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111221110121 is a deficient number, since it is larger than the sum of its proper divisors (10205008567).

111221110121 is a wasteful number, since it uses less digits than its factorization.

111221110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7833223.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111221110121 its reverse (121011122111), we get a palindrome (232232232232).

The spelling of 111221110121 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred ten thousand, one hundred twenty-one".