233120221 has 4 divisors (see below), whose sum is σ = 235428444. Its totient is φ = 230812000.

The previous prime is 233120207. The next prime is 233120267. The reversal of 233120221 is 122021332.

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 206956996 + 26163225 = 14386^2 + 5115^2 .

It is a cyclic number.

It is not a de Polignac number, because 233120221 - 2⁵ = 233120189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233120195 and 233120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233120021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1153960 + ... + 1154161.

It is an arithmetic number, because the mean of its divisors is an integer number (58857111).

Almost surely, 2^233120221 is an apocalyptic number.

It is an amenable number.

233120221 is a deficient number, since it is larger than the sum of its proper divisors (2308223).

233120221 is a wasteful number, since it uses less digits than its factorization.

233120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308222.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 233120221 is about 15268.2749844244. The cubic root of 233120221 is about 615.4507643384.

Adding to 233120221 its reverse (122021332), we get a palindrome (355141553).

The spelling of 233120221 in words is "two hundred thirty-three million, one hundred twenty thousand, two hundred twenty-one".