12020001009 has 4 divisors (see below), whose sum is σ = 16026668016. Its totient is φ = 8013334004.

The previous prime is 12020000983. The next prime is 12020001047. The reversal of 12020001009 is 90010002021.

It is a happy number.

12020001009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12020001009 is a prime.

It is a super-2 number, since 2×12020001009² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12020001109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2003333499 + ... + 2003333504.

It is an arithmetic number, because the mean of its divisors is an integer number (4006667004).

Almost surely, 2^12020001009 is an apocalyptic number.

It is an amenable number.

12020001009 is a deficient number, since it is larger than the sum of its proper divisors (4006667007).

12020001009 is an equidigital number, since it uses as much as digits as its factorization.

12020001009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006667006.

The product of its (nonzero) digits is 36, while the sum is 15.

The spelling of 12020001009 in words is "twelve billion, twenty million, one thousand, nine".