233123121221 has 16 divisors (see below), whose sum is σ = 250069775040. Its totient is φ = 216645736320.

The previous prime is 233123121191. The next prime is 233123121227. The reversal of 233123121221 is 122121321332.

It is a cyclic number.

It is not a de Polignac number, because 233123121221 - 2⁶ = 233123121157 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 (233123121227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6235841 + ... + 6273113.

It is an arithmetic number, because the mean of its divisors is an integer number (15629360940).

Almost surely, 2^233123121221 is an apocalyptic number.

It is an amenable number.

233123121221 is a deficient number, since it is larger than the sum of its proper divisors (16946653819).

233123121221 is a wasteful number, since it uses less digits than its factorization.

233123121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43556.

The product of its digits is 864, while the sum is 23.

Adding to 233123121221 its reverse (122121321332), we get a palindrome (355244442553).

The spelling of 233123121221 in words is "two hundred thirty-three billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred twenty-one".