123320121 has 8 divisors (see below), whose sum is σ = 164533824. Its totient is φ = 82159920.

The previous prime is 123320117. The next prime is 123320137. The reversal of 123320121 is 121023321.

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

It is not a de Polignac number, because 123320121 - 2² = 123320117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123320121.

It is not an unprimeable number, because it can be changed into a prime (123320161) 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 7 ways as a sum of consecutive naturals, for example, 7645 + ... + 17466.

It is an arithmetic number, because the mean of its divisors is an integer number (20566728).

Almost surely, 2^123320121 is an apocalyptic number.

It is an amenable number.

123320121 is a deficient number, since it is larger than the sum of its proper divisors (41213703).

123320121 is a wasteful number, since it uses less digits than its factorization.

123320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26751.

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

The square root of 123320121 is about 11104.9592975391. The cubic root of 123320121 is about 497.7500519877.

Adding to 123320121 its reverse (121023321), we get a palindrome (244343442).

The spelling of 123320121 in words is "one hundred twenty-three million, three hundred twenty thousand, one hundred twenty-one".