320000232121 has 4 divisors (see below), whose sum is σ = 320246198244. Its totient is φ = 319754266000.

The previous prime is 320000232103. The next prime is 320000232169. The reversal of 320000232121 is 121232000023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121232000023 = 17 ⋅7131294119.

It can be written as a sum of positive squares in 2 ways, for example, as 26302352400 + 293697879721 = 162180^2 + 541939^2 .

It is a cyclic number.

It is not a de Polignac number, because 320000232121 - 2⁹ = 320000231609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320000232095 and 320000232104.

It is not an unprimeable number, because it can be changed into a prime (320000236121) 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 3 ways as a sum of consecutive naturals, for example, 122981110 + ... + 122983711.

It is an arithmetic number, because the mean of its divisors is an integer number (80061549561).

Almost surely, 2^320000232121 is an apocalyptic number.

It is an amenable number.

320000232121 is a deficient number, since it is larger than the sum of its proper divisors (245966123).

320000232121 is a wasteful number, since it uses less digits than its factorization.

320000232121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245966122.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 320000232121 its reverse (121232000023), we get a palindrome (441232232144).

The spelling of 320000232121 in words is "three hundred twenty billion, two hundred thirty-two thousand, one hundred twenty-one".