121330321 has 6 divisors (see below), whose sum is σ = 141139410. Its totient is φ = 103997376.

The previous prime is 121330283. The next prime is 121330327. The reversal of 121330321 is 123033121.

It can be written as a sum of positive squares in only one way, i.e., 114254721 + 7075600 = 10689^2 + 2660^2 .

It is not a de Polignac number, because 121330321 - 2¹³ = 121322129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121330295 and 121330304.

It is not an unprimeable number, because it can be changed into a prime (121330327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1238016 + ... + 1238113.

It is an arithmetic number, because the mean of its divisors is an integer number (23523235).

Almost surely, 2^121330321 is an apocalyptic number.

It is an amenable number.

121330321 is a deficient number, since it is larger than the sum of its proper divisors (19809089).

121330321 is an equidigital number, since it uses as much as digits as its factorization.

121330321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476143 (or 2476136 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 121330321 is about 11015.0043576932. The cubic root of 121330321 is about 495.0584170760.

Adding to 121330321 its reverse (123033121), we get a palindrome (244363442).

The spelling of 121330321 in words is "one hundred twenty-one million, three hundred thirty thousand, three hundred twenty-one".