12018121 has 8 divisors (see below), whose sum is σ = 12778560. Its totient is φ = 11277552.

The previous prime is 12018107. The next prime is 12018163. The reversal of 12018121 is 12181021.

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

It is not a de Polignac number, because 12018121 - 2⁹ = 12017609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12018095 and 12018104.

It is not an unprimeable number, because it can be changed into a prime (12018101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3711 + ... + 6148.

It is an arithmetic number, because the mean of its divisors is an integer number (1597320).

Almost surely, 2^12018121 is an apocalyptic number.

It is an amenable number.

12018121 is a deficient number, since it is larger than the sum of its proper divisors (760439).

12018121 is an equidigital number, since it uses as much as digits as its factorization.

12018121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9935.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 12018121 is about 3466.7161695184. The cubic root of 12018121 is about 229.0580314781.

Adding to 12018121 its reverse (12181021), we get a palindrome (24199142).

The spelling of 12018121 in words is "twelve million, eighteen thousand, one hundred twenty-one".