1323230221997 has 2 divisors, whose sum is σ = 1323230221998. Its totient is φ = 1323230221996.

The previous prime is 1323230221969. The next prime is 1323230222029. The reversal of 1323230221997 is 7991220323231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1108596304201 + 214633917796 = 1052899^2 + 463286^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323230221997 - 2⁸ = 1323230221741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323230221597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661615110998 + 661615110999.

It is an arithmetic number, because the mean of its divisors is an integer number (661615110999).

Almost surely, 2^{1323230221997} is an apocalyptic number.

It is an amenable number.

1323230221997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323230221997 is an equidigital number, since it uses as much as digits as its factorization.

1323230221997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 44.

The spelling of 1323230221997 in words is "one trillion, three hundred twenty-three billion, two hundred thirty million, two hundred twenty-one thousand, nine hundred ninety-seven".