221134775185 has 4 divisors (see below), whose sum is σ = 265361730228. Its totient is φ = 176907820144.

The previous prime is 221134775161. The next prime is 221134775203. The reversal of 221134775185 is 581577431122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41894311761 + 179240463424 = 204681^2 + 423368^2 .

It is a cyclic number.

It is not a de Polignac number, because 221134775185 - 2⁹ = 221134774673 is a prime.

It is a super-2 number, since 2×221134775185² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22113477514 + ... + 22113477523.

It is an arithmetic number, because the mean of its divisors is an integer number (66340432557).

Almost surely, 2^221134775185 is an apocalyptic number.

It is an amenable number.

221134775185 is a deficient number, since it is larger than the sum of its proper divisors (44226955043).

221134775185 is an equidigital number, since it uses as much as digits as its factorization.

221134775185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44226955042.

The product of its digits is 470400, while the sum is 46.

The spelling of 221134775185 in words is "two hundred twenty-one billion, one hundred thirty-four million, seven hundred seventy-five thousand, one hundred eighty-five".