233213121 has 8 divisors (see below), whose sum is σ = 345500960. Its totient is φ = 155475396.

The previous prime is 233213119. The next prime is 233213137. The reversal of 233213121 is 121312332.

233213121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 233213121 - 2¹ = 233213119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233213094 and 233213103.

It is not an unprimeable number, because it can be changed into a prime (233213521) 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, 4318735 + ... + 4318788.

It is an arithmetic number, because the mean of its divisors is an integer number (43187620).

Almost surely, 2^233213121 is an apocalyptic number.

It is an amenable number.

233213121 is a deficient number, since it is larger than the sum of its proper divisors (112287839).

233213121 is an equidigital number, since it uses as much as digits as its factorization.

233213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8637532 (or 8637526 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 233213121 is about 15271.3169373175. The cubic root of 233213121 is about 615.5325072584.

Adding to 233213121 its reverse (121312332), we get a palindrome (354525453).

The spelling of 233213121 in words is "two hundred thirty-three million, two hundred thirteen thousand, one hundred twenty-one".