1323111311 has 2 divisors, whose sum is σ = 1323111312. Its totient is φ = 1323111310.

The previous prime is 1323111299. The next prime is 1323111337. The reversal of 1323111311 is 1131113231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323111311 is a prime.

It is a super-2 number, since 2×1323111311² = 3501247082592277442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1323111311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323114311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661555655 + 661555656.

It is an arithmetic number, because the mean of its divisors is an integer number (661555656).

Almost surely, 2^1323111311 is an apocalyptic number.

1323111311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323111311 is an equidigital number, since it uses as much as digits as its factorization.

1323111311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 17.

The square root of 1323111311 is about 36374.5970561874. The cubic root of 1323111311 is about 1097.8224998213.

Adding to 1323111311 its reverse (1131113231), we get a palindrome (2454224542).

It can be divided in two parts, 13231 and 11311, that added together give a palindrome (24542).

The spelling of 1323111311 in words is "one billion, three hundred twenty-three million, one hundred eleven thousand, three hundred eleven".