1320311311 has 16 divisors (see below), whose sum is σ = 1521066240. Its totient is φ = 1133421120.

The previous prime is 1320311287. The next prime is 1320311383. The reversal of 1320311311 is 1131130231.

It is a cyclic number.

It is not a de Polignac number, because 1320311311 - 2⁷ = 1320311183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320311011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55326 + ... + 75508.

It is an arithmetic number, because the mean of its divisors is an integer number (95066640).

Almost surely, 2^1320311311 is an apocalyptic number.

1320311311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1320311311 is a deficient number, since it is larger than the sum of its proper divisors (200754929).

1320311311 is a wasteful number, since it uses less digits than its factorization.

1320311311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20526.

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

The square root of 1320311311 is about 36336.0882732305. The cubic root of 1320311311 is about 1097.0475401026.

Adding to 1320311311 its reverse (1131130231), we get a palindrome (2451441542).

The spelling of 1320311311 in words is "one billion, three hundred twenty million, three hundred eleven thousand, three hundred eleven".