221121201221209 has 8 divisors (see below), whose sum is σ = 236704229676000. Its totient is φ = 205932679816032.

The previous prime is 221121201221159. The next prime is 221121201221233. The reversal of 221121201221209 is 902122102121122.

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 221121201221209 - 2³⁵ = 221086841482841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221121201221269) 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, 98626761244 + ... + 98626763485.

It is an arithmetic number, because the mean of its divisors is an integer number (29588028709500).

Almost surely, 2^{221121201221209} is an apocalyptic number.

It is an amenable number.

221121201221209 is a deficient number, since it is larger than the sum of its proper divisors (15583028454791).

221121201221209 is a wasteful number, since it uses less digits than its factorization.

221121201221209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197253524807.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 221121201221209 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred nine".