12012001 has 4 divisors (see below), whose sum is σ = 12050692. Its totient is φ = 11973312.

The previous prime is 12011983. The next prime is 12012017. The reversal of 12012001 is 10021021.

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 40401 + 11971600 = 201^2 + 3460^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012001 - 2⁵ = 12011969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012101) 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 3 ways as a sum of consecutive naturals, for example, 18876 + ... + 19501.

It is an arithmetic number, because the mean of its divisors is an integer number (3012673).

Almost surely, 2^12012001 is an apocalyptic number.

It is an amenable number.

12012001 is a deficient number, since it is larger than the sum of its proper divisors (38691).

12012001 is an equidigital number, since it uses as much as digits as its factorization.

12012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38690.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 12012001 is about 3465.8333774144. The cubic root of 12012001 is about 229.0191437248.

Adding to 12012001 its reverse (10021021), we get a palindrome (22033022).

It can be divided in two parts, 120 and 12001, that added together give a palindrome (12121).

The spelling of 12012001 in words is "twelve million, twelve thousand, one".