12320121 has 16 divisors (see below), whose sum is σ = 18975168. Its totient is φ = 7027200.

The previous prime is 12320117. The next prime is 12320123. The reversal of 12320121 is 12102321.

12320121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12320121 - 2² = 12320117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12320097 and 12320106.

It is not an unprimeable number, because it can be changed into a prime (12320123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10420 + ... + 11541.

It is an arithmetic number, because the mean of its divisors is an integer number (1185948).

Almost surely, 2^12320121 is an apocalyptic number.

12320121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12320121 is a deficient number, since it is larger than the sum of its proper divisors (6655047).

12320121 is a wasteful number, since it uses less digits than its factorization.

12320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21992.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12320121 is about 3510.0029914517. The cubic root of 12320121 is about 230.9608261751.

Adding to 12320121 its reverse (12102321), we get a palindrome (24422442).

The spelling of 12320121 in words is "twelve million, three hundred twenty thousand, one hundred twenty-one".