1212300009 has 12 divisors (see below), whose sum is σ = 1768102336. Its totient is φ = 800352792.

The previous prime is 1212299953. The next prime is 1212300059. The reversal of 1212300009 is 9000032121.

It is a happy number.

It is not a de Polignac number, because 1212300009 - 2²⁸ = 943864553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212299964 and 1212300000.

It is not an unprimeable number, because it can be changed into a prime (1212300059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 652957 + ... + 654810.

Almost surely, 2^1212300009 is an apocalyptic number.

It is an amenable number.

1212300009 is a deficient number, since it is larger than the sum of its proper divisors (555802327).

1212300009 is a wasteful number, since it uses less digits than its factorization.

1212300009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307876 (or 1307873 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1212300009 is about 34818.0988711331. The cubic root of 1212300009 is about 1066.2769870306.

The spelling of 1212300009 in words is "one billion, two hundred twelve million, three hundred thousand, nine".