1311123130211 has 4 divisors (see below), whose sum is σ = 1339019367072. Its totient is φ = 1283226893352.

The previous prime is 1311123130199. The next prime is 1311123130243. The reversal of 1311123130211 is 1120313211131.

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 1311123130211 - 2³⁸ = 1036245223267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311123132211) 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, 13948118360 + ... + 13948118453.

It is an arithmetic number, because the mean of its divisors is an integer number (334754841768).

Almost surely, 2^{1311123130211} is an apocalyptic number.

1311123130211 is a deficient number, since it is larger than the sum of its proper divisors (27896236861).

1311123130211 is an equidigital number, since it uses as much as digits as its factorization.

1311123130211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27896236860.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1311123130211 its reverse (1120313211131), we get a palindrome (2431436341342).

The spelling of 1311123130211 in words is "one trillion, three hundred eleven billion, one hundred twenty-three million, one hundred thirty thousand, two hundred eleven".