1311201111023 has 16 divisors (see below), whose sum is σ = 1468069505280. Its totient is φ = 1165134489600.

The previous prime is 1311201110993. The next prime is 1311201111047. The reversal of 1311201111023 is 3201111021131.

It is a cyclic number.

It is not a de Polignac number, because 1311201111023 - 2¹⁴ = 1311201094639 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 a junction number, because it is equal to n+sod(n) for n = 1311201110992 and 1311201111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311201114023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30320438 + ... + 30363651.

It is an arithmetic number, because the mean of its divisors is an integer number (91754344080).

Almost surely, 2^{1311201111023} is an apocalyptic number.

1311201111023 is a deficient number, since it is larger than the sum of its proper divisors (156868394257).

1311201111023 is a wasteful number, since it uses less digits than its factorization.

1311201111023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60684178.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1311201111023 its reverse (3201111021131), we get a palindrome (4512312132154).

The spelling of 1311201111023 in words is "one trillion, three hundred eleven billion, two hundred one million, one hundred eleven thousand, twenty-three".