1320131311 has 16 divisors (see below), whose sum is σ = 1447234560. Its totient is φ = 1198765440.

The previous prime is 1320131291. The next prime is 1320131321. The reversal of 1320131311 is 1131310231.

It is a cyclic number.

It is not a de Polignac number, because 1320131311 - 2²⁷ = 1185913583 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 (1320131321) 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, 179260 + ... + 186478.

It is an arithmetic number, because the mean of its divisors is an integer number (90452160).

Almost surely, 2^1320131311 is an apocalyptic number.

1320131311 is a deficient number, since it is larger than the sum of its proper divisors (127103249).

1320131311 is a wasteful number, since it uses less digits than its factorization.

1320131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7614.

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

The square root of 1320131311 is about 36333.6113123923. The cubic root of 1320131311 is about 1096.9976837973.

Adding to 1320131311 its reverse (1131310231), we get a palindrome (2451441542).

The spelling of 1320131311 in words is "one billion, three hundred twenty million, one hundred thirty-one thousand, three hundred eleven".