123235221 has 4 divisors (see below), whose sum is σ = 164313632. Its totient is φ = 82156812.

The previous prime is 123235213. The next prime is 123235243. The reversal of 123235221 is 122532321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 123235221 - 2³ = 123235213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123235421) 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, 20539201 + ... + 20539206.

It is an arithmetic number, because the mean of its divisors is an integer number (41078408).

Almost surely, 2^123235221 is an apocalyptic number.

It is an amenable number.

123235221 is a deficient number, since it is larger than the sum of its proper divisors (41078411).

123235221 is an equidigital number, since it uses as much as digits as its factorization.

123235221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41078410.

The product of its digits is 720, while the sum is 21.

The square root of 123235221 is about 11101.1360229483. The cubic root of 123235221 is about 497.6358000701.

Adding to 123235221 its reverse (122532321), we get a palindrome (245767542).

The spelling of 123235221 in words is "one hundred twenty-three million, two hundred thirty-five thousand, two hundred twenty-one".