221113020221 has 4 divisors (see below), whose sum is σ = 221451631932. Its totient is φ = 220774408512.

The previous prime is 221113020217. The next prime is 221113020241. The reversal of 221113020221 is 122020311122.

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 122353044100 + 98759976121 = 349790^2 + 314261^2 .

It is a cyclic number.

It is not a de Polignac number, because 221113020221 - 2² = 221113020217 is a prime.

It is a super-2 number, since 2×221113020221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221113020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221113020241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169304876 + ... + 169306181.

It is an arithmetic number, because the mean of its divisors is an integer number (55362907983).

Almost surely, 2^221113020221 is an apocalyptic number.

It is an amenable number.

221113020221 is a deficient number, since it is larger than the sum of its proper divisors (338611711).

221113020221 is an equidigital number, since it uses as much as digits as its factorization.

221113020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338611710.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221113020221 its reverse (122020311122), we get a palindrome (343133331343).

The spelling of 221113020221 in words is "two hundred twenty-one billion, one hundred thirteen million, twenty thousand, two hundred twenty-one".