320000121 has 24 divisors (see below), whose sum is σ = 541142784. Its totient is φ = 178395840.

The previous prime is 320000113. The next prime is 320000137. The reversal of 320000121 is 121000023.

It is a happy number.

It is not a de Polignac number, because 320000121 - 2³ = 320000113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (320000171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59361 + ... + 64526.

It is an arithmetic number, because the mean of its divisors is an integer number (22547616).

Almost surely, 2^320000121 is an apocalyptic number.

It is an amenable number.

320000121 is a deficient number, since it is larger than the sum of its proper divisors (221142663).

320000121 is a wasteful number, since it uses less digits than its factorization.

320000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123941 (or 123938 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 320000121 is about 17888.5472020508. The cubic root of 320000121 is about 683.9904648820.

Adding to 320000121 its reverse (121000023), we get a palindrome (441000144).

The spelling of 320000121 in words is "three hundred twenty million, one hundred twenty-one", and thus it is an aban number.