1323100366261 has 2 divisors, whose sum is σ = 1323100366262. Its totient is φ = 1323100366260.

The previous prime is 1323100366193. The next prime is 1323100366319. The reversal of 1323100366261 is 1626630013231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1251335314161 + 71765052100 = 1118631^2 + 267890^2 .

It is an emirp because it is prime and its reverse (1626630013231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323100366261 - 2¹⁵ = 1323100333493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323100366361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661550183130 + 661550183131.

It is an arithmetic number, because the mean of its divisors is an integer number (661550183131).

Almost surely, 2^{1323100366261} is an apocalyptic number.

It is an amenable number.

1323100366261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323100366261 is an equidigital number, since it uses as much as digits as its factorization.

1323100366261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

Adding to 1323100366261 its reverse (1626630013231), we get a palindrome (2949730379492).

The spelling of 1323100366261 in words is "one trillion, three hundred twenty-three billion, one hundred million, three hundred sixty-six thousand, two hundred sixty-one".