12120013 has 4 divisors (see below), whose sum is σ = 12150940. Its totient is φ = 12089088.

The previous prime is 12120001. The next prime is 12120019. The reversal of 12120013 is 31002121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2866249 + 9253764 = 1693^2 + 3042^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120013 - 2⁹ = 12119501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14868 + ... + 15661.

It is an arithmetic number, because the mean of its divisors is an integer number (3037735).

Almost surely, 2^12120013 is an apocalyptic number.

It is an amenable number.

12120013 is a deficient number, since it is larger than the sum of its proper divisors (30927).

12120013 is an equidigital number, since it uses as much as digits as its factorization.

12120013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30926.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 12120013 is about 3481.3809041816. The cubic root of 12120013 is about 229.7035436955.

Adding to 12120013 its reverse (31002121), we get a palindrome (43122134).

The spelling of 12120013 in words is "twelve million, one hundred twenty thousand, thirteen".