1311112142 has 4 divisors (see below), whose sum is σ = 1966668216. Its totient is φ = 655556070.

The previous prime is 1311112139. The next prime is 1311112163. The reversal of 1311112142 is 2412111131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2412111131 = 23 ⋅104874397.

It is a self number, because there is not a number n which added to its sum of digits gives 1311112142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327778034 + ... + 327778037.

It is an arithmetic number, because the mean of its divisors is an integer number (491667054).

Almost surely, 2^1311112142 is an apocalyptic number.

1311112142 is a deficient number, since it is larger than the sum of its proper divisors (655556074).

1311112142 is an equidigital number, since it uses as much as digits as its factorization.

1311112142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655556073.

The product of its digits is 48, while the sum is 17.

The square root of 1311112142 is about 36209.2825391501. The cubic root of 1311112142 is about 1094.4937345395.

Adding to 1311112142 its reverse (2412111131), we get a palindrome (3723223273).

The spelling of 1311112142 in words is "one billion, three hundred eleven million, one hundred twelve thousand, one hundred forty-two".