1323111319961 has 2 divisors, whose sum is σ = 1323111319962. Its totient is φ = 1323111319960.

The previous prime is 1323111319909. The next prime is 1323111320017. The reversal of 1323111319961 is 1699131113231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 967555518736 + 355555801225 = 983644^2 + 596285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323111319961 - 2¹⁸ = 1323111057817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1323111319661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661555659980 + 661555659981.

It is an arithmetic number, because the mean of its divisors is an integer number (661555659981).

Almost surely, 2^{1323111319961} is an apocalyptic number.

It is an amenable number.

1323111319961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323111319961 is an equidigital number, since it uses as much as digits as its factorization.

1323111319961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 41.

The spelling of 1323111319961 in words is "one trillion, three hundred twenty-three billion, one hundred eleven million, three hundred nineteen thousand, nine hundred sixty-one".