1200212210009 has 2 divisors, whose sum is σ = 1200212210010. Its totient is φ = 1200212210008.

The previous prime is 1200212210003. The next prime is 1200212210069. The reversal of 1200212210009 is 9000122120021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 792821064025 + 407391145984 = 890405^2 + 638272^2 .

It is an emirp because it is prime and its reverse (9000122120021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200212210009 - 2¹⁶ = 1200212144473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200212210003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600106105004 + 600106105005.

It is an arithmetic number, because the mean of its divisors is an integer number (600106105005).

Almost surely, 2^{1200212210009} is an apocalyptic number.

It is an amenable number.

1200212210009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200212210009 is an equidigital number, since it uses as much as digits as its factorization.

1200212210009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 1200212210009 in words is "one trillion, two hundred billion, two hundred twelve million, two hundred ten thousand, nine".