221311222985 has 16 divisors (see below), whose sum is σ = 274898804736. Its totient is φ = 170907444288.

The previous prime is 221311222981. The next prime is 221311222999. The reversal of 221311222985 is 589222113122.

It is a cyclic number.

It is not a de Polignac number, because 221311222985 - 2² = 221311222981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221311222981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4686257 + ... + 4733246.

It is an arithmetic number, because the mean of its divisors is an integer number (17181175296).

Almost surely, 2^221311222985 is an apocalyptic number.

It is an amenable number.

221311222985 is a deficient number, since it is larger than the sum of its proper divisors (53587581751).

221311222985 is a wasteful number, since it uses less digits than its factorization.

221311222985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9419672.

The product of its digits is 34560, while the sum is 38.

The spelling of 221311222985 in words is "two hundred twenty-one billion, three hundred eleven million, two hundred twenty-two thousand, nine hundred eighty-five".