123313221 has 12 divisors (see below), whose sum is σ = 178260160. Its totient is φ = 82143720.

The previous prime is 123313219. The next prime is 123313231. The reversal of 123313221 is 122313321.

123313221 is a `hidden beast` number, since 12 + 331 + 322 + 1 = 666.

It is not a de Polignac number, because 123313221 - 2¹ = 123313219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123313194 and 123313203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123313231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8436 + ... + 17826.

Almost surely, 2^123313221 is an apocalyptic number.

It is an amenable number.

123313221 is a deficient number, since it is larger than the sum of its proper divisors (54946939).

123313221 is a wasteful number, since it uses less digits than its factorization.

123313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10856 (or 10853 counting only the distinct ones).

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

The square root of 123313221 is about 11104.6486211856. The cubic root of 123313221 is about 497.7407684542.

Adding to 123313221 its reverse (122313321), we get a palindrome (245626542).

The spelling of 123313221 in words is "one hundred twenty-three million, three hundred thirteen thousand, two hundred twenty-one".