1323012013261 has 2 divisors, whose sum is σ = 1323012013262. Its totient is φ = 1323012013260.

The previous prime is 1323012013247. The next prime is 1323012013273. The reversal of 1323012013261 is 1623102103231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1221135502500 + 101876510761 = 1105050^2 + 319181^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323012013261 - 2⁷ = 1323012013133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323012013291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661506006630 + 661506006631.

It is an arithmetic number, because the mean of its divisors is an integer number (661506006631).

Almost surely, 2^{1323012013261} is an apocalyptic number.

It is an amenable number.

1323012013261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323012013261 is an equidigital number, since it uses as much as digits as its factorization.

1323012013261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 1323012013261 its reverse (1623102103231), we get a palindrome (2946114116492).

The spelling of 1323012013261 in words is "one trillion, three hundred twenty-three billion, twelve million, thirteen thousand, two hundred sixty-one".