233223121 has 4 divisors (see below), whose sum is σ = 233446500. Its totient is φ = 232999744.

The previous prime is 233223113. The next prime is 233223139. The reversal of 233223121 is 121322332.

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 160376896 + 72846225 = 12664^2 + 8535^2 .

It is a cyclic number.

It is not a de Polignac number, because 233223121 - 2³ = 233223113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233223421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110116 + ... + 112213.

It is an arithmetic number, because the mean of its divisors is an integer number (58361625).

Almost surely, 2^233223121 is an apocalyptic number.

It is an amenable number.

233223121 is a deficient number, since it is larger than the sum of its proper divisors (223379).

233223121 is a wasteful number, since it uses less digits than its factorization.

233223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223378.

The product of its digits is 432, while the sum is 19.

The square root of 233223121 is about 15271.6443449944. The cubic root of 233223121 is about 615.5413049868.

Adding to 233223121 its reverse (121322332), we get a palindrome (354545453).

The spelling of 233223121 in words is "two hundred thirty-three million, two hundred twenty-three thousand, one hundred twenty-one".