331020120221 has 8 divisors (see below), whose sum is σ = 378314000064. Its totient is φ = 283727563200.

The previous prime is 331020120173. The next prime is 331020120227. The reversal of 331020120221 is 122021020133.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331020120221 is a prime.

It is a super-2 number, since 2×331020120221² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 331020120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331020120227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280946 + ... + 860796.

It is an arithmetic number, because the mean of its divisors is an integer number (47289250008).

Almost surely, 2^331020120221 is an apocalyptic number.

It is an amenable number.

331020120221 is a deficient number, since it is larger than the sum of its proper divisors (47293879843).

331020120221 is an equidigital number, since it uses as much as digits as its factorization.

331020120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661411.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 331020120221 its reverse (122021020133), we get a palindrome (453041140354).

The spelling of 331020120221 in words is "three hundred thirty-one billion, twenty million, one hundred twenty thousand, two hundred twenty-one".