1200221220009 has 32 divisors (see below), whose sum is σ = 1915923456000. Its totient is φ = 653808826944.

The previous prime is 1200221219999. The next prime is 1200221220017. The reversal of 1200221220009 is 9000221220021.

It is a happy number.

It is not a de Polignac number, because 1200221220009 - 2⁴ = 1200221219993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1200221220049) 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, 12425349 + ... + 12521570.

It is an arithmetic number, because the mean of its divisors is an integer number (59872608000).

Almost surely, 2^{1200221220009} is an apocalyptic number.

It is an amenable number.

1200221220009 is a deficient number, since it is larger than the sum of its proper divisors (715702235991).

1200221220009 is a wasteful number, since it uses less digits than its factorization.

1200221220009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24947037.

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 1200221220009 in words is "one trillion, two hundred billion, two hundred twenty-one million, two hundred twenty thousand, nine".