221122222209 has 24 divisors (see below), whose sum is σ = 369647765760. Its totient is φ = 124756115328.

The previous prime is 221122222207. The next prime is 221122222247. The reversal of 221122222209 is 902222221122.

221122222209 is a `hidden beast` number, since 2 + 211 + 2 + 222 + 220 + 9 = 666.

It is not a de Polignac number, because 221122222209 - 2¹ = 221122222207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221122222207) 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, 22209432 + ... + 22219385.

It is an arithmetic number, because the mean of its divisors is an integer number (15401990240).

Almost surely, 2^221122222209 is an apocalyptic number.

It is an amenable number.

221122222209 is a deficient number, since it is larger than the sum of its proper divisors (148525543551).

221122222209 is a wasteful number, since it uses less digits than its factorization.

221122222209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44428909 (or 44428906 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 221122222209 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred nine".