1320213311 has 4 divisors (see below), whose sum is σ = 1320727800. Its totient is φ = 1319698824.

The previous prime is 1320213289. The next prime is 1320213329. The reversal of 1320213311 is 1133120231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320213311 - 2³⁰ = 246471487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320213311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320213331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253376 + ... + 258533.

It is an arithmetic number, because the mean of its divisors is an integer number (330181950).

Almost surely, 2^1320213311 is an apocalyptic number.

1320213311 is a deficient number, since it is larger than the sum of its proper divisors (514489).

1320213311 is an equidigital number, since it uses as much as digits as its factorization.

1320213311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514488.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1320213311 is about 36334.7397266032. The cubic root of 1320213311 is about 1097.0203966761.

Adding to 1320213311 its reverse (1133120231), we get a palindrome (2453333542).

The spelling of 1320213311 in words is "one billion, three hundred twenty million, two hundred thirteen thousand, three hundred eleven".