233121121 has 8 divisors (see below), whose sum is σ = 239163624. Its totient is φ = 227095680.

The previous prime is 233121107. The next prime is 233121151. The reversal of 233121121 is 121121332.

233121121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 75342400 + 157778721 = 8680^2 + 12561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233121121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233121095 and 233121104.

It is not an unprimeable number, because it can be changed into a prime (233121101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26175 + ... + 33931.

It is an arithmetic number, because the mean of its divisors is an integer number (29895453).

Almost surely, 2^233121121 is an apocalyptic number.

It is an amenable number.

233121121 is a deficient number, since it is larger than the sum of its proper divisors (6042503).

233121121 is an equidigital number, since it uses as much as digits as its factorization.

233121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8531.

The product of its digits is 72, while the sum is 16.

The square root of 233121121 is about 15268.3044572736. The cubic root of 233121121 is about 615.4515563546.

Adding to 233121121 its reverse (121121332), we get a palindrome (354242453).

The spelling of 233121121 in words is "two hundred thirty-three million, one hundred twenty-one thousand, one hundred twenty-one".