12120020009 has 2 divisors, whose sum is σ = 12120020010. Its totient is φ = 12120020008.

The previous prime is 12120019979. The next prime is 12120020023. The reversal of 12120020009 is 90002002121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12100660009 + 19360000 = 110003^2 + 4400^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120020009 - 2⁸ = 12120019753 is a prime.

It is not a weakly prime, because it can be changed into another prime (12120020909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060010004 + 6060010005.

It is an arithmetic number, because the mean of its divisors is an integer number (6060010005).

Almost surely, 2^12120020009 is an apocalyptic number.

It is an amenable number.

12120020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120020009 is an equidigital number, since it uses as much as digits as its factorization.

12120020009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

It can be divided in two parts, 12 and 120020009, that added together give a palindrome (120020021).

The spelling of 12120020009 in words is "twelve billion, one hundred twenty million, twenty thousand, nine".