320021121097 has 2 divisors, whose sum is σ = 320021121098. Its totient is φ = 320021121096.

The previous prime is 320021121067. The next prime is 320021121137. The reversal of 320021121097 is 790121120023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225336292416 + 94684828681 = 474696^2 + 307709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320021121097 is a prime.

It is not a weakly prime, because it can be changed into another prime (320021121067) 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 as a sum of consecutive naturals, namely, 160010560548 + 160010560549.

It is an arithmetic number, because the mean of its divisors is an integer number (160010560549).

Almost surely, 2^320021121097 is an apocalyptic number.

It is an amenable number.

320021121097 is a deficient number, since it is larger than the sum of its proper divisors (1).

320021121097 is an equidigital number, since it uses as much as digits as its factorization.

320021121097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The spelling of 320021121097 in words is "three hundred twenty billion, twenty-one million, one hundred twenty-one thousand, ninety-seven".