1212102009 has 32 divisors (see below), whose sum is σ = 1876896000. Its totient is φ = 772111872.

The previous prime is 1212101963. The next prime is 1212102013. The reversal of 1212102009 is 9002012121.

It is not a de Polignac number, because 1212102009 - 2⁷ = 1212101881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212101982 and 1212102000.

It is not an unprimeable number, because it can be changed into a prime (1212102019) 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 in 31 ways as a sum of consecutive naturals, for example, 67972 + ... + 83930.

It is an arithmetic number, because the mean of its divisors is an integer number (58653000).

Almost surely, 2^1212102009 is an apocalyptic number.

It is an amenable number.

1212102009 is a deficient number, since it is larger than the sum of its proper divisors (664793991).

1212102009 is a wasteful number, since it uses less digits than its factorization.

1212102009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16094 (or 16088 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1212102009 is about 34815.2554062152. The cubic root of 1212102009 is about 1066.2189336508.

The spelling of 1212102009 in words is "one billion, two hundred twelve million, one hundred two thousand, nine".