1323111031211 has 2 divisors, whose sum is σ = 1323111031212. Its totient is φ = 1323111031210.

The previous prime is 1323111031171. The next prime is 1323111031267. The reversal of 1323111031211 is 1121301113231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323111031211 is a prime.

It is a super-2 number, since 2×1323111031211² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1323111031111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661555515605 + 661555515606.

It is an arithmetic number, because the mean of its divisors is an integer number (661555515606).

Almost surely, 2^{1323111031211} is an apocalyptic number.

1323111031211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323111031211 is an equidigital number, since it uses as much as digits as its factorization.

1323111031211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1323111031211 its reverse (1121301113231), we get a palindrome (2444412144442).

The spelling of 1323111031211 in words is "one trillion, three hundred twenty-three billion, one hundred eleven million, thirty-one thousand, two hundred eleven".