1312111142 has 16 divisors (see below), whose sum is σ = 2011414032. Its totient is φ = 641715360.

The previous prime is 1312111133. The next prime is 1312111181. The reversal of 1312111142 is 2411112131.

It is a self number, because there is not a number n which added to its sum of digits gives 1312111142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16388 + ... + 53784.

It is an arithmetic number, because the mean of its divisors is an integer number (125713377).

Almost surely, 2^1312111142 is an apocalyptic number.

1312111142 is a deficient number, since it is larger than the sum of its proper divisors (699302890).

1312111142 is a wasteful number, since it uses less digits than its factorization.

1312111142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37783.

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

The square root of 1312111142 is about 36223.0747176437. The cubic root of 1312111142 is about 1094.7716466058.

Adding to 1312111142 its reverse (2411112131), we get a palindrome (3723223273).

The spelling of 1312111142 in words is "one billion, three hundred twelve million, one hundred eleven thousand, one hundred forty-two".