1212330009 has 32 divisors (see below), whose sum is σ = 1785991680. Its totient is φ = 725379200.

The previous prime is 1212330001. The next prime is 1212330011. The reversal of 1212330009 is 9000332121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1212330009 - 2³ = 1212330001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212330001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1839322 + ... + 1839980.

It is an arithmetic number, because the mean of its divisors is an integer number (55812240).

Almost surely, 2^1212330009 is an apocalyptic number.

It is an amenable number.

1212330009 is a deficient number, since it is larger than the sum of its proper divisors (573661671).

1212330009 is a wasteful number, since it uses less digits than its factorization.

1212330009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1212330009 is about 34818.5296788937. The cubic root of 1212330009 is about 1066.2857824458.

The spelling of 1212330009 in words is "one billion, two hundred twelve million, three hundred thirty thousand, nine".