331303133221 has 8 divisors (see below), whose sum is σ = 333476862840. Its totient is φ = 329134373568.

The previous prime is 331303133197. The next prime is 331303133261. The reversal of 331303133221 is 122331303133.

It can be written as a sum of positive squares in 4 ways, for example, as 220537308996 + 110765824225 = 469614^2 + 332815^2 .

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 331303133221 - 2¹⁹ = 331302608933 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 (331303133261) 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, 1108686 + ... + 1375423.

It is an arithmetic number, because the mean of its divisors is an integer number (41684607855).

Almost surely, 2^331303133221 is an apocalyptic number.

It is an amenable number.

331303133221 is a deficient number, since it is larger than the sum of its proper divisors (2173729619).

331303133221 is a wasteful number, since it uses less digits than its factorization.

331303133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484983.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 331303133221 its reverse (122331303133), we get a palindrome (453634436354).

The spelling of 331303133221 in words is "three hundred thirty-one billion, three hundred three million, one hundred thirty-three thousand, two hundred twenty-one".