1201221201209 has 8 divisors (see below), whose sum is σ = 1203368994912. Its totient is φ = 1199074592160.

The previous prime is 1201221201161. The next prime is 1201221201247. The reversal of 1201221201209 is 9021021221021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201221201209 - 2²⁰ = 1201220152633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201221201259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1746182 + ... + 2334864.

It is an arithmetic number, because the mean of its divisors is an integer number (150421124364).

Almost surely, 2^{1201221201209} is an apocalyptic number.

It is an amenable number.

1201221201209 is a deficient number, since it is larger than the sum of its proper divisors (2147793703).

1201221201209 is an equidigital number, since it uses as much as digits as its factorization.

1201221201209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592327.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 1201221201209 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred one thousand, two hundred nine".