12110121 has 16 divisors (see below), whose sum is σ = 18721920. Its totient is φ = 7722000.

The previous prime is 12110113. The next prime is 12110123. The reversal of 12110121 is 12101121.

It is a happy number.

It is not a de Polignac number, because 12110121 - 2³ = 12110113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (12110123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9130 + ... + 10371.

It is an arithmetic number, because the mean of its divisors is an integer number (1170120).

Almost surely, 2^12110121 is an apocalyptic number.

It is an amenable number.

12110121 is a deficient number, since it is larger than the sum of its proper divisors (6611799).

12110121 is a wasteful number, since it uses less digits than its factorization.

12110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19533 (or 19527 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 12110121 is about 3479.9599135622. The cubic root of 12110121 is about 229.6410342491.

Adding to 12110121 its reverse (12101121), we get a palindrome (24211242).

The spelling of 12110121 in words is "twelve million, one hundred ten thousand, one hundred twenty-one".