12110121221 has 8 divisors (see below), whose sum is σ = 13334510304. Its totient is φ = 10906310320.

The previous prime is 12110121193. The next prime is 12110121227. The reversal of 12110121221 is 12212101121.

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 12110121221 - 2¹⁸ = 12109859077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12110121196 and 12110121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12110121227) 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, 5143310 + ... + 5145663.

It is an arithmetic number, because the mean of its divisors is an integer number (1666813788).

Almost surely, 2^12110121221 is an apocalyptic number.

12110121221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12110121221 is a deficient number, since it is larger than the sum of its proper divisors (1224389083).

12110121221 is a wasteful number, since it uses less digits than its factorization.

12110121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10289091.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12110121221 its reverse (12212101121), we get a palindrome (24322222342).

It can be divided in two parts, 12110 and 121221, that added together give a palindrome (133331).

The spelling of 12110121221 in words is "twelve billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty-one".