1323213131249 has 2 divisors, whose sum is σ = 1323213131250. Its totient is φ = 1323213131248.

The previous prime is 1323213131189. The next prime is 1323213131281. The reversal of 1323213131249 is 9421313123231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1038782908849 + 284430222400 = 1019207^2 + 533320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323213131249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1323213131549) 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, 661606565624 + 661606565625.

It is an arithmetic number, because the mean of its divisors is an integer number (661606565625).

Almost surely, 2^{1323213131249} is an apocalyptic number.

It is an amenable number.

1323213131249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323213131249 is an equidigital number, since it uses as much as digits as its factorization.

1323213131249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The spelling of 1323213131249 in words is "one trillion, three hundred twenty-three billion, two hundred thirteen million, one hundred thirty-one thousand, two hundred forty-nine".