320102112221 has 4 divisors (see below), whose sum is σ = 338931648252. Its totient is φ = 301272576192.

The previous prime is 320102112179. The next prime is 320102112241. The reversal of 320102112221 is 122211201023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122211201023 = 107693 ⋅1134811.

It can be written as a sum of positive squares in 2 ways, for example, as 173317346596 + 146784765625 = 416314^2 + 383125^2 .

It is a cyclic number.

It is not a de Polignac number, because 320102112221 - 2²⁶ = 320035003357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 18829536013 = 320102112221 / (3 + 2 + 0 + 1 + 0 + 2 + 1 + 1 + 2 + 2 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320102112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320102112241) 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, 9414767990 + ... + 9414768023.

It is an arithmetic number, because the mean of its divisors is an integer number (84732912063).

Almost surely, 2^320102112221 is an apocalyptic number.

It is an amenable number.

320102112221 is a deficient number, since it is larger than the sum of its proper divisors (18829536031).

320102112221 is a wasteful number, since it uses less digits than its factorization.

320102112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18829536030.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 320102112221 its reverse (122211201023), we get a palindrome (442313313244).

The spelling of 320102112221 in words is "three hundred twenty billion, one hundred two million, one hundred twelve thousand, two hundred twenty-one".