223131333221 has 4 divisors (see below), whose sum is σ = 225340554444. Its totient is φ = 220922112000.

The previous prime is 223131333181. The next prime is 223131333247. The reversal of 223131333221 is 122333131322.

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 203667177025 + 19464156196 = 451295^2 + 139514^2 .

It is a cyclic number.

It is not a de Polignac number, because 223131333221 - 2⁶ = 223131333157 is a prime.

It is a super-3 number, since 3×223131333221³ (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 (223131333251) 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, 1104610460 + ... + 1104610661.

It is an arithmetic number, because the mean of its divisors is an integer number (56335138611).

Almost surely, 2^223131333221 is an apocalyptic number.

It is an amenable number.

223131333221 is a deficient number, since it is larger than the sum of its proper divisors (2209221223).

223131333221 is a wasteful number, since it uses less digits than its factorization.

223131333221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209221222.

The product of its digits is 3888, while the sum is 26.

Adding to 223131333221 its reverse (122333131322), we get a palindrome (345464464543).

The spelling of 223131333221 in words is "two hundred twenty-three billion, one hundred thirty-one million, three hundred thirty-three thousand, two hundred twenty-one".