331221230322121 has 8 divisors (see below), whose sum is σ = 334976333242824. Its totient is φ = 327487282911360.

The previous prime is 331221230322119. The next prime is 331221230322137. The reversal of 331221230322121 is 121223032122133.

It can be written as a sum of positive squares in 4 ways, for example, as 103636248075721 + 227584982246400 = 10180189^2 + 15085920^2 .

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 331221230322121 - 2¹ = 331221230322119 is a prime.

It is a super-2 number, since 2×331221230322121² (a number of 30 digits) contains 22 as substring.

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 331221230322121.

It is not an unprimeable number, because it can be changed into a prime (331221230322161) 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, 5288845996 + ... + 5288908621.

It is an arithmetic number, because the mean of its divisors is an integer number (41872041655353).

Almost surely, 2^{331221230322121} is an apocalyptic number.

It is an amenable number.

331221230322121 is a deficient number, since it is larger than the sum of its proper divisors (3755102920703).

331221230322121 is a wasteful number, since it uses less digits than its factorization.

331221230322121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10577754971.

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

Adding to 331221230322121 its reverse (121223032122133), we get a palindrome (452444262444254).

The spelling of 331221230322121 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirty million, three hundred twenty-two thousand, one hundred twenty-one".