221133302221 has 8 divisors (see below), whose sum is σ = 242636831640. Its totient is φ = 200271669312.

The previous prime is 221133302213. The next prime is 221133302231. The reversal of 221133302221 is 122203331122.

It can be written as a sum of positive squares in 4 ways, for example, as 15847284996 + 205286017225 = 125886^2 + 453085^2 .

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

It is not a de Polignac number, because 221133302221 - 2³ = 221133302213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221133302192 and 221133302201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221133302231) 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, 160473406 + ... + 160474783.

It is an arithmetic number, because the mean of its divisors is an integer number (30329603955).

Almost surely, 2^221133302221 is an apocalyptic number.

It is an amenable number.

221133302221 is a deficient number, since it is larger than the sum of its proper divisors (21503529419).

221133302221 is a wasteful number, since it uses less digits than its factorization.

221133302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320948255.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 221133302221 its reverse (122203331122), we get a palindrome (343336633343).

The spelling of 221133302221 in words is "two hundred twenty-one billion, one hundred thirty-three million, three hundred two thousand, two hundred twenty-one".