12120011222009 has 4 divisors (see below), whose sum is σ = 12240011333220. Its totient is φ = 12000011110800.

The previous prime is 12120011221943. The next prime is 12120011222041. The reversal of 12120011222009 is 90022211002121.

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 8285601054784 + 3834410167225 = 2878472^2 + 1958165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120011222009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120011222309) 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, 60000055454 + ... + 60000055655.

It is an arithmetic number, because the mean of its divisors is an integer number (3060002833305).

Almost surely, 2^{12120011222009} is an apocalyptic number.

It is an amenable number.

12120011222009 is a deficient number, since it is larger than the sum of its proper divisors (120000111211).

12120011222009 is a wasteful number, since it uses less digits than its factorization.

12120011222009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120000111210.

The product of its (nonzero) digits is 288, while the sum is 23.

It can be divided in two parts, 121200112 and 22009, that added together give a palindrome (121222121).

The spelling of 12120011222009 in words is "twelve trillion, one hundred twenty billion, eleven million, two hundred twenty-two thousand, nine".