1220220009 has 12 divisors (see below), whose sum is σ = 1763276736. Its totient is φ = 813139992.

The previous prime is 1220219971. The next prime is 1220220019. The reversal of 1220220009 is 9000220221.

It is a de Polignac number, because none of the positive numbers 2^k-1220220009 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220219973 and 1220220000.

It is not an unprimeable number, because it can be changed into a prime (1220220019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4557 + ... + 49610.

It is an arithmetic number, because the mean of its divisors is an integer number (146939728).

Almost surely, 2^1220220009 is an apocalyptic number.

It is an amenable number.

1220220009 is a deficient number, since it is larger than the sum of its proper divisors (543056727).

1220220009 is a wasteful number, since it uses less digits than its factorization.

1220220009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56676 (or 56673 counting only the distinct ones).

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

The square root of 1220220009 is about 34931.6476708443. The cubic root of 1220220009 is about 1068.5939574788.

The spelling of 1220220009 in words is "one billion, two hundred twenty million, two hundred twenty thousand, nine".