123121113321 has 8 divisors (see below), whose sum is σ = 164263644864. Its totient is φ = 82029662000.

The previous prime is 123121113317. The next prime is 123121113359. The reversal of 123121113321 is 123311121321.

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

It is a cyclic number.

It is not a de Polignac number, because 123121113321 - 2² = 123121113317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123121113121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12764430 + ... + 12774071.

It is an arithmetic number, because the mean of its divisors is an integer number (20532955608).

Almost surely, 2^123121113321 is an apocalyptic number.

It is an amenable number.

123121113321 is a deficient number, since it is larger than the sum of its proper divisors (41142531543).

123121113321 is a wasteful number, since it uses less digits than its factorization.

123121113321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25540111.

The product of its digits is 216, while the sum is 21.

Adding to 123121113321 its reverse (123311121321), we get a palindrome (246432234642).

The spelling of 123121113321 in words is "one hundred twenty-three billion, one hundred twenty-one million, one hundred thirteen thousand, three hundred twenty-one".