233231223033221 has 6 divisors (see below), whose sum is σ = 271309790059110. Its totient is φ = 199912476885576.

The previous prime is 233231223033191. The next prime is 233231223033223. The reversal of 233231223033221 is 122330322132332.

It can be written as a sum of positive squares in only one way, i.e., 186097643181121 + 47133579852100 = 13641761^2 + 6865390^2 .

It is not a de Polignac number, because 233231223033221 - 2¹⁸ = 233231222771077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233231223033223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2379910439066 + ... + 2379910439163.

It is an arithmetic number, because the mean of its divisors is an integer number (45218298343185).

Almost surely, 2^{233231223033221} is an apocalyptic number.

It is an amenable number.

233231223033221 is a deficient number, since it is larger than the sum of its proper divisors (38078567025889).

233231223033221 is an equidigital number, since it uses as much as digits as its factorization.

233231223033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4759820878243 (or 4759820878236 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 32.

Adding to 233231223033221 its reverse (122330322132332), we get a palindrome (355561545165553).

The spelling of 233231223033221 in words is "two hundred thirty-three trillion, two hundred thirty-one billion, two hundred twenty-three million, thirty-three thousand, two hundred twenty-one".