1311201111311 has 16 divisors (see below), whose sum is σ = 1623686529024. Its totient is φ = 1031069209824.

The previous prime is 1311201111293. The next prime is 1311201111313. The reversal of 1311201111311 is 1131111021131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1311201111311 - 2¹⁴ = 1311201094927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311201111311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311201111313) 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, 44183951 + ... + 44213616.

It is an arithmetic number, because the mean of its divisors is an integer number (101480408064).

Almost surely, 2^{1311201111311} is an apocalyptic number.

1311201111311 is a deficient number, since it is larger than the sum of its proper divisors (312485417713).

1311201111311 is a wasteful number, since it uses less digits than its factorization.

1311201111311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88397750.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 1311201111311 its reverse (1131111021131), we get a palindrome (2442312132442).

The spelling of 1311201111311 in words is "one trillion, three hundred eleven billion, two hundred one million, one hundred eleven thousand, three hundred eleven".