123310221 has 8 divisors (see below), whose sum is σ = 164466240. Its totient is φ = 82180512.

The previous prime is 123310189. The next prime is 123310223. The reversal of 123310221 is 122013321.

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

It is not a de Polignac number, because 123310221 - 2⁵ = 123310189 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123310221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123310223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11320 + ... + 19358.

It is an arithmetic number, because the mean of its divisors is an integer number (20558280).

Almost surely, 2^123310221 is an apocalyptic number.

It is an amenable number.

123310221 is a deficient number, since it is larger than the sum of its proper divisors (41156019).

123310221 is an equidigital number, since it uses as much as digits as its factorization.

123310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13155.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 123310221 is about 11104.5135417991. The cubic root of 123310221 is about 497.7367320273.

Adding to 123310221 its reverse (122013321), we get a palindrome (245323542).

The spelling of 123310221 in words is "one hundred twenty-three million, three hundred ten thousand, two hundred twenty-one".