221020110233 has 4 divisors (see below), whose sum is σ = 238021657188. Its totient is φ = 204018563280.

The previous prime is 221020110221. The next prime is 221020110257. The reversal of 221020110233 is 332011020122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 332011020122 = 2 ⋅166005510061.

It can be written as a sum of positive squares in 2 ways, for example, as 122155143049 + 98864967184 = 349507^2 + 314428^2 .

It is a cyclic number.

It is not a de Polignac number, because 221020110233 - 2²⁰ = 221019061657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221020170233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8500773458 + ... + 8500773483.

It is an arithmetic number, because the mean of its divisors is an integer number (59505414297).

Almost surely, 2^221020110233 is an apocalyptic number.

It is an amenable number.

221020110233 is a deficient number, since it is larger than the sum of its proper divisors (17001546955).

221020110233 is a wasteful number, since it uses less digits than its factorization.

221020110233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17001546954.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221020110233 its reverse (332011020122), we get a palindrome (553031130355).

The spelling of 221020110233 in words is "two hundred twenty-one billion, twenty million, one hundred ten thousand, two hundred thirty-three".