12020220009 has 24 divisors (see below), whose sum is σ = 19845825792. Its totient is φ = 6867685440.

The previous prime is 12020220001. The next prime is 12020220029. The reversal of 12020220009 is 90002202021.

It is not a de Polignac number, because 12020220009 - 2³ = 12020220001 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12020219973 and 12020220000.

It is not an unprimeable number, because it can be changed into a prime (12020220001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 714357 + ... + 730989.

It is an arithmetic number, because the mean of its divisors is an integer number (826909408).

Almost surely, 2^12020220009 is an apocalyptic number.

It is an amenable number.

12020220009 is a deficient number, since it is larger than the sum of its proper divisors (7825605783).

12020220009 is a wasteful number, since it uses less digits than its factorization.

12020220009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28117 (or 28114 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The spelling of 12020220009 in words is "twelve billion, twenty million, two hundred twenty thousand, nine".