320754210221 has 4 divisors (see below), whose sum is σ = 334700045472. Its totient is φ = 306808374972.

The previous prime is 320754210199. The next prime is 320754210239. The reversal of 320754210221 is 122012457023.

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 not a de Polignac number, because 320754210221 - 2¹⁸ = 320753948077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320754210521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6972917591 + ... + 6972917636.

It is an arithmetic number, because the mean of its divisors is an integer number (83675011368).

Almost surely, 2^320754210221 is an apocalyptic number.

It is an amenable number.

320754210221 is a deficient number, since it is larger than the sum of its proper divisors (13945835251).

320754210221 is a wasteful number, since it uses less digits than its factorization.

320754210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13945835250.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 320754210221 its reverse (122012457023), we get a palindrome (442766667244).

The spelling of 320754210221 in words is "three hundred twenty billion, seven hundred fifty-four million, two hundred ten thousand, two hundred twenty-one".