320202401421 has 16 divisors (see below), whose sum is σ = 490623206528. Its totient is φ = 181961899200.

The previous prime is 320202401417. The next prime is 320202401447. The reversal of 320202401421 is 124104202023.

It is not a de Polignac number, because 320202401421 - 2² = 320202401417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320202401621) 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, 42117010 + ... + 42124611.

It is an arithmetic number, because the mean of its divisors is an integer number (30663950408).

Almost surely, 2^320202401421 is an apocalyptic number.

It is an amenable number.

320202401421 is a deficient number, since it is larger than the sum of its proper divisors (170420805107).

320202401421 is a wasteful number, since it uses less digits than its factorization.

320202401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84241812.

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

Adding to 320202401421 its reverse (124104202023), we get a palindrome (444306603444).

The spelling of 320202401421 in words is "three hundred twenty billion, two hundred two million, four hundred one thousand, four hundred twenty-one".