331303122212221 has 8 divisors (see below), whose sum is σ = 332077965884280. Its totient is φ = 330528323284992.

The previous prime is 331303122212177. The next prime is 331303122212287. The reversal of 331303122212221 is 122212221303133.

It can be written as a sum of positive squares in 4 ways, for example, as 29530149247225 + 301772972964996 = 5434165^2 + 17371614^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331303122212221 - 2²¹ = 331303120115069 is a prime.

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 331303122212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331303122212521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3662685 + ... + 26000413.

It is an arithmetic number, because the mean of its divisors is an integer number (41509745735535).

Almost surely, 2^{331303122212221} is an apocalyptic number.

It is an amenable number.

331303122212221 is a deficient number, since it is larger than the sum of its proper divisors (774843672059).

331303122212221 is a wasteful number, since it uses less digits than its factorization.

331303122212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22372415.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 331303122212221 its reverse (122212221303133), we get a palindrome (453515343515354).

The spelling of 331303122212221 in words is "three hundred thirty-one trillion, three hundred three billion, one hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".