320120402421 has 4 divisors (see below), whose sum is σ = 426827203232. Its totient is φ = 213413601612.

The previous prime is 320120402411. The next prime is 320120402431. The reversal of 320120402421 is 124204021023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (320120402411) and next prime (320120402431).

It is not a de Polignac number, because 320120402421 - 2⁷ = 320120402293 is a prime.

It is a super-2 number, since 2×320120402421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320120402411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53353400401 + ... + 53353400406.

It is an arithmetic number, because the mean of its divisors is an integer number (106706800808).

Almost surely, 2^320120402421 is an apocalyptic number.

It is an amenable number.

320120402421 is a deficient number, since it is larger than the sum of its proper divisors (106706800811).

320120402421 is a wasteful number, since it uses less digits than its factorization.

320120402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106706800810.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 320120402421 its reverse (124204021023), we get a palindrome (444324423444).

The spelling of 320120402421 in words is "three hundred twenty billion, one hundred twenty million, four hundred two thousand, four hundred twenty-one".