1213340311 has 4 divisors (see below), whose sum is σ = 1225849072. Its totient is φ = 1200831552.

The previous prime is 1213340299. The next prime is 1213340327. The reversal of 1213340311 is 1130433121.

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 1213340311 - 2²³ = 1204951703 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 (1213340111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6254235 + ... + 6254428.

It is an arithmetic number, because the mean of its divisors is an integer number (306462268).

Almost surely, 2^1213340311 is an apocalyptic number.

1213340311 is a deficient number, since it is larger than the sum of its proper divisors (12508761).

1213340311 is an equidigital number, since it uses as much as digits as its factorization.

1213340311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12508760.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1213340311 is about 34833.0347658656. The cubic root of 1213340311 is about 1066.5818986130.

Adding to 1213340311 its reverse (1130433121), we get a palindrome (2343773432).

The spelling of 1213340311 in words is "one billion, two hundred thirteen million, three hundred forty thousand, three hundred eleven".