321223441100197 has 2 divisors, whose sum is σ = 321223441100198. Its totient is φ = 321223441100196.

The previous prime is 321223441100189. The next prime is 321223441100231. The reversal of 321223441100197 is 791001144322123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267641714538081 + 53581726562116 = 16359759^2 + 7319954^2 .

It is a cyclic number.

It is not a de Polignac number, because 321223441100197 - 2³ = 321223441100189 is a prime.

It is a super-2 number, since 2×321223441100197² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321223441100137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160611720550098 + 160611720550099.

It is an arithmetic number, because the mean of its divisors is an integer number (160611720550099).

Almost surely, 2^{321223441100197} is an apocalyptic number.

It is an amenable number.

321223441100197 is a deficient number, since it is larger than the sum of its proper divisors (1).

321223441100197 is an equidigital number, since it uses as much as digits as its factorization.

321223441100197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 321223441100197 in words is "three hundred twenty-one trillion, two hundred twenty-three billion, four hundred forty-one million, one hundred thousand, one hundred ninety-seven".