1311230013211 has 4 divisors (see below), whose sum is σ = 1311239661912. Its totient is φ = 1311220364512.

The previous prime is 1311230013169. The next prime is 1311230013263. The reversal of 1311230013211 is 1123100321131.

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 1311230013211 - 2²¹ = 1311227916059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311230013011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4617550 + ... + 4893283.

It is an arithmetic number, because the mean of its divisors is an integer number (327809915478).

Almost surely, 2^{1311230013211} is an apocalyptic number.

1311230013211 is a deficient number, since it is larger than the sum of its proper divisors (9648701).

1311230013211 is an equidigital number, since it uses as much as digits as its factorization.

1311230013211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9648700.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1311230013211 its reverse (1123100321131), we get a palindrome (2434330334342).

The spelling of 1311230013211 in words is "one trillion, three hundred eleven billion, two hundred thirty million, thirteen thousand, two hundred eleven".