221221010223 has 40 divisors (see below), whose sum is σ = 332217408336. Its totient is φ = 146700460800.

The previous prime is 221221010203. The next prime is 221221010299. The reversal of 221221010223 is 322010122122.

221221010223 is a `hidden beast` number, since 221 + 2 + 210 + 10 + 223 = 666.

It is not a de Polignac number, because 221221010223 - 2¹⁰ = 221221009199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221221010196 and 221221010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221010203) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18363240 + ... + 18375282.

Almost surely, 2^221221010223 is an apocalyptic number.

221221010223 is a deficient number, since it is larger than the sum of its proper divisors (110996398113).

221221010223 is a wasteful number, since it uses less digits than its factorization.

221221010223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13237 (or 13228 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221221010223 its reverse (322010122122), we get a palindrome (543231132345).

The spelling of 221221010223 in words is "two hundred twenty-one billion, two hundred twenty-one million, ten thousand, two hundred twenty-three".