123021321 has 8 divisors (see below), whose sum is σ = 167123520. Its totient is φ = 80466672.

The previous prime is 123021307. The next prime is 123021331. The reversal of 123021321 is 123120321.

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

It is not a de Polignac number, because 123021321 - 2⁵ = 123021289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123021321.

It is not an unprimeable number, because it can be changed into a prime (123021331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386701 + ... + 387018.

It is an arithmetic number, because the mean of its divisors is an integer number (20890440).

Almost surely, 2^123021321 is an apocalyptic number.

It is an amenable number.

123021321 is a deficient number, since it is larger than the sum of its proper divisors (44102199).

123021321 is an equidigital number, since it uses as much as digits as its factorization.

123021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773775.

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

The square root of 123021321 is about 11091.4976896720. The cubic root of 123021321 is about 497.3477170001.

Adding to 123021321 its reverse (123120321), we get a palindrome (246141642).

The spelling of 123021321 in words is "one hundred twenty-three million, twenty-one thousand, three hundred twenty-one".