321431609798881 has 2 divisors, whose sum is σ = 321431609798882. Its totient is φ = 321431609798880.

The previous prime is 321431609798753. The next prime is 321431609798911. The reversal of 321431609798881 is 188897906134123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 293617957760656 + 27813652038225 = 17135284^2 + 5273865^2 .

It is a cyclic number.

It is not a de Polignac number, because 321431609798881 - 2⁷ = 321431609798753 is a prime.

It is a super-2 number, since 2×321431609798881² (a number of 30 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 321431609798881.

It is not a weakly prime, because it can be changed into another prime (321431609798381) 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, 160715804899440 + 160715804899441.

It is an arithmetic number, because the mean of its divisors is an integer number (160715804899441).

Almost surely, 2^{321431609798881} is an apocalyptic number.

It is an amenable number.

321431609798881 is a deficient number, since it is larger than the sum of its proper divisors (1).

321431609798881 is an equidigital number, since it uses as much as digits as its factorization.

321431609798881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125411328, while the sum is 70.

The spelling of 321431609798881 in words is "three hundred twenty-one trillion, four hundred thirty-one billion, six hundred nine million, seven hundred ninety-eight thousand, eight hundred eighty-one".