223112021221 has 16 divisors (see below), whose sum is σ = 235602520000. Its totient is φ = 210697314048.

The previous prime is 223112021219. The next prime is 223112021243. The reversal of 223112021221 is 122120211322.

223112021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 223112021221 - 2¹ = 223112021219 is a prime.

It is a super-3 number, since 3×223112021221³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223112021201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8301421 + ... + 8328253.

It is an arithmetic number, because the mean of its divisors is an integer number (14725157500).

Almost surely, 2^223112021221 is an apocalyptic number.

It is an amenable number.

223112021221 is a deficient number, since it is larger than the sum of its proper divisors (12490498779).

223112021221 is a wasteful number, since it uses less digits than its factorization.

223112021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28228.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 223112021221 its reverse (122120211322), we get a palindrome (345232232543).

The spelling of 223112021221 in words is "two hundred twenty-three billion, one hundred twelve million, twenty-one thousand, two hundred twenty-one".