1311031313211 has 4 divisors (see below), whose sum is σ = 1748041750952. Its totient is φ = 874020875472.

The previous prime is 1311031313183. The next prime is 1311031313231. The reversal of 1311031313211 is 1123131301131.

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

It is not a de Polignac number, because 1311031313211 - 2⁹ = 1311031312699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311031313231) 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, 218505218866 + ... + 218505218871.

It is an arithmetic number, because the mean of its divisors is an integer number (437010437738).

Almost surely, 2^{1311031313211} is an apocalyptic number.

1311031313211 is a deficient number, since it is larger than the sum of its proper divisors (437010437741).

1311031313211 is an equidigital number, since it uses as much as digits as its factorization.

1311031313211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437010437740.

The product of its (nonzero) digits is 162, while the sum is 21.

Adding to 1311031313211 its reverse (1123131301131), we get a palindrome (2434162614342).

The spelling of 1311031313211 in words is "one trillion, three hundred eleven billion, thirty-one million, three hundred thirteen thousand, two hundred eleven".