1311223020011 has 16 divisors (see below), whose sum is σ = 1391900018688. Its totient is φ = 1230941712000.

The previous prime is 1311223020007. The next prime is 1311223020073. The reversal of 1311223020011 is 1100203221131.

It is not a de Polignac number, because 1311223020011 - 2² = 1311223020007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311223020001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27321086 + ... + 27369036.

It is an arithmetic number, because the mean of its divisors is an integer number (86993751168).

Almost surely, 2^{1311223020011} is an apocalyptic number.

1311223020011 is a deficient number, since it is larger than the sum of its proper divisors (80676998677).

1311223020011 is a wasteful number, since it uses less digits than its factorization.

1311223020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52042.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1311223020011 its reverse (1100203221131), we get a palindrome (2411426241142).

The spelling of 1311223020011 in words is "one trillion, three hundred eleven billion, two hundred twenty-three million, twenty thousand, eleven".