1231112013311 has 4 divisors (see below), whose sum is σ = 1231115867112. Its totient is φ = 1231108159512.

The previous prime is 1231112013293. The next prime is 1231112013319. The reversal of 1231112013311 is 1133102111321.

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 1231112013311 - 2¹⁴ = 1231111996927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231112013319) 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, 1399625 + ... + 2102658.

It is an arithmetic number, because the mean of its divisors is an integer number (307778966778).

Almost surely, 2^{1231112013311} is an apocalyptic number.

1231112013311 is a deficient number, since it is larger than the sum of its proper divisors (3853801).

1231112013311 is an equidigital number, since it uses as much as digits as its factorization.

1231112013311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853800.

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

Adding to 1231112013311 its reverse (1133102111321), we get a palindrome (2364214124632).

The spelling of 1231112013311 in words is "one trillion, two hundred thirty-one billion, one hundred twelve million, thirteen thousand, three hundred eleven".