321223434001021 has 2 divisors, whose sum is σ = 321223434001022. Its totient is φ = 321223434001020.

The previous prime is 321223434000947. The next prime is 321223434001109. The reversal of 321223434001021 is 120100434322123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161666393336100 + 159557040664921 = 12714810^2 + 12631589^2 .

It is a cyclic number.

It is not a de Polignac number, because 321223434001021 - 2⁷ = 321223434000893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321223434002021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160611717000510 + 160611717000511.

It is an arithmetic number, because the mean of its divisors is an integer number (160611717000511).

Almost surely, 2^{321223434001021} is an apocalyptic number.

It is an amenable number.

321223434001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

321223434001021 is an equidigital number, since it uses as much as digits as its factorization.

321223434001021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 321223434001021 its reverse (120100434322123), we get a palindrome (441323868323144).

The spelling of 321223434001021 in words is "three hundred twenty-one trillion, two hundred twenty-three billion, four hundred thirty-four million, one thousand, twenty-one".