223232331221 has 4 divisors (see below), whose sum is σ = 223327691244. Its totient is φ = 223136971200.

The previous prime is 223232331199. The next prime is 223232331229. The reversal of 223232331221 is 122133232322.

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 168013911025 + 55218420196 = 409895^2 + 234986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223232331221 is a prime.

It is a super-3 number, since 3×223232331221³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223232331229) 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, 47676500 + ... + 47681181.

It is an arithmetic number, because the mean of its divisors is an integer number (55831922811).

Almost surely, 2^223232331221 is an apocalyptic number.

It is an amenable number.

223232331221 is a deficient number, since it is larger than the sum of its proper divisors (95360023).

223232331221 is an equidigital number, since it uses as much as digits as its factorization.

223232331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95360022.

The product of its digits is 5184, while the sum is 26.

Adding to 223232331221 its reverse (122133232322), we get a palindrome (345365563543).

The spelling of 223232331221 in words is "two hundred twenty-three billion, two hundred thirty-two million, three hundred thirty-one thousand, two hundred twenty-one".