331222132200121 has 2 divisors, whose sum is σ = 331222132200122. Its totient is φ = 331222132200120.

The previous prime is 331222132200109. The next prime is 331222132200137. The reversal of 331222132200121 is 121002231222133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312337579955625 + 18884552244496 = 17673075^2 + 4345636^2 .

It is an emirp because it is prime and its reverse (121002231222133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331222132200121 - 2⁷ = 331222132199993 is a prime.

It is not a weakly prime, because it can be changed into another prime (331222132200821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165611066100060 + 165611066100061.

It is an arithmetic number, because the mean of its divisors is an integer number (165611066100061).

Almost surely, 2^{331222132200121} is an apocalyptic number.

It is an amenable number.

331222132200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

331222132200121 is an equidigital number, since it uses as much as digits as its factorization.

331222132200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 331222132200121 its reverse (121002231222133), we get a palindrome (452224363422254).

The spelling of 331222132200121 in words is "three hundred thirty-one trillion, two hundred twenty-two billion, one hundred thirty-two million, two hundred thousand, one hundred twenty-one".