320303212421 has 16 divisors (see below), whose sum is σ = 349870399488. Its totient is φ = 292317841200.

The previous prime is 320303212399. The next prime is 320303212433. The reversal of 320303212421 is 124212303023.

It is a cyclic number.

It is not a de Polignac number, because 320303212421 - 2²⁶ = 320236103557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320303212451) 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 15 ways as a sum of consecutive naturals, for example, 3112991 + ... + 3214236.

It is an arithmetic number, because the mean of its divisors is an integer number (21866899968).

Almost surely, 2^320303212421 is an apocalyptic number.

320303212421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

320303212421 is a deficient number, since it is larger than the sum of its proper divisors (29567187067).

320303212421 is a wasteful number, since it uses less digits than its factorization.

320303212421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6327352.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 320303212421 its reverse (124212303023), we get a palindrome (444515515444).

The spelling of 320303212421 in words is "three hundred twenty billion, three hundred three million, two hundred twelve thousand, four hundred twenty-one".