1323011311 has 2 divisors, whose sum is σ = 1323011312. Its totient is φ = 1323011310.

The previous prime is 1323011309. The next prime is 1323011317. The reversal of 1323011311 is 1131103231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1323011311 - 2¹ = 1323011309 is a prime.

Together with 1323011309, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323011317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661505655 + 661505656.

It is an arithmetic number, because the mean of its divisors is an integer number (661505656).

Almost surely, 2^1323011311 is an apocalyptic number.

1323011311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323011311 is an equidigital number, since it uses as much as digits as its factorization.

1323011311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1323011311 is about 36373.2224445402. Note that the first 3 decimals coincide. The cubic root of 1323011311 is about 1097.7948415246.

Adding to 1323011311 its reverse (1131103231), we get a palindrome (2454114542).

The spelling of 1323011311 in words is "one billion, three hundred twenty-three million, eleven thousand, three hundred eleven".