123201321 has 16 divisors (see below), whose sum is σ = 168478464. Its totient is φ = 80038224.

The previous prime is 123201307. The next prime is 123201341. The reversal of 123201321 is 123102321.

It is not a de Polignac number, because 123201321 - 2⁵ = 123201289 is a prime.

It is a super-2 number, since 2×123201321² = 30357130992290082, which contains 22 as substring.

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 123201321.

It is not an unprimeable number, because it can be changed into a prime (123201341) 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 15 ways as a sum of consecutive naturals, for example, 74910 + ... + 76536.

It is an arithmetic number, because the mean of its divisors is an integer number (10529904).

Almost surely, 2^123201321 is an apocalyptic number.

It is an amenable number.

123201321 is a deficient number, since it is larger than the sum of its proper divisors (45277143).

123201321 is a wasteful number, since it uses less digits than its factorization.

123201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260.

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

The square root of 123201321 is about 11099.6090471692. The cubic root of 123201321 is about 497.5901653871.

Adding to 123201321 its reverse (123102321), we get a palindrome (246303642).

The spelling of 123201321 in words is "one hundred twenty-three million, two hundred one thousand, three hundred twenty-one".