12003121 has 8 divisors (see below), whose sum is σ = 13010984. Its totient is φ = 11007360.

The previous prime is 12003109. The next prime is 12003127. The reversal of 12003121 is 12130021.

It can be written as a sum of positive squares in 4 ways, for example, as 874225 + 11128896 = 935^2 + 3336^2 .

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

It is not a de Polignac number, because 12003121 - 2⁹ = 12002609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12003098 and 12003107.

It is not an unprimeable number, because it can be changed into a prime (12003127) 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, 900 + ... + 4981.

It is an arithmetic number, because the mean of its divisors is an integer number (1626373).

Almost surely, 2^12003121 is an apocalyptic number.

It is an amenable number.

12003121 is a deficient number, since it is larger than the sum of its proper divisors (1007863).

12003121 is a wasteful number, since it uses less digits than its factorization.

12003121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6051.

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

The square root of 12003121 is about 3464.5520633987. The cubic root of 12003121 is about 228.9626948633.

Adding to 12003121 its reverse (12130021), we get a palindrome (24133142).

The spelling of 12003121 in words is "twelve million, three thousand, one hundred twenty-one".