320121421 has 8 divisors (see below), whose sum is σ = 321968480. Its totient is φ = 318279888.

The previous prime is 320121413. The next prime is 320121457. The reversal of 320121421 is 124121023.

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 320121421 - 2³ = 320121413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320121395 and 320121404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320121721) 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 7 ways as a sum of consecutive naturals, for example, 170530 + ... + 172396.

It is an arithmetic number, because the mean of its divisors is an integer number (40246060).

Almost surely, 2^320121421 is an apocalyptic number.

It is an amenable number.

320121421 is a deficient number, since it is larger than the sum of its proper divisors (1847059).

320121421 is a wasteful number, since it uses less digits than its factorization.

320121421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 320121421 is about 17891.9373182448. The cubic root of 320121421 is about 684.0768789766.

Adding to 320121421 its reverse (124121023), we get a palindrome (444242444).

It can be divided in two parts, 32012 and 1421, that added together give a palindrome (33433).

The spelling of 320121421 in words is "three hundred twenty million, one hundred twenty-one thousand, four hundred twenty-one".