233310021221 has 4 divisors (see below), whose sum is σ = 238735835712. Its totient is φ = 227884206732.

The previous prime is 233310021169. The next prime is 233310021229. The reversal of 233310021221 is 122120013332.

233310021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 233310021221 - 2⁶ = 233310021157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233310021193 and 233310021202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233310021229) 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 3 ways as a sum of consecutive naturals, for example, 2712907181 + ... + 2712907266.

It is an arithmetic number, because the mean of its divisors is an integer number (59683958928).

Almost surely, 2^233310021221 is an apocalyptic number.

It is an amenable number.

233310021221 is a deficient number, since it is larger than the sum of its proper divisors (5425814491).

233310021221 is an equidigital number, since it uses as much as digits as its factorization.

233310021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5425814490.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 233310021221 its reverse (122120013332), we get a palindrome (355430034553).

The spelling of 233310021221 in words is "two hundred thirty-three billion, three hundred ten million, twenty-one thousand, two hundred twenty-one".