1212012032009 has 2 divisors, whose sum is σ = 1212012032010. Its totient is φ = 1212012032008.

The previous prime is 1212012031957. The next prime is 1212012032027. The reversal of 1212012032009 is 9002302102121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 805994563984 + 406017468025 = 897772^2 + 637195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212012032009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1212012032909) 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 as a sum of consecutive naturals, namely, 606006016004 + 606006016005.

It is an arithmetic number, because the mean of its divisors is an integer number (606006016005).

Almost surely, 2^{1212012032009} is an apocalyptic number.

It is an amenable number.

1212012032009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212012032009 is an equidigital number, since it uses as much as digits as its factorization.

1212012032009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 1212012032009 in words is "one trillion, two hundred twelve billion, twelve million, thirty-two thousand, nine".