1311122512 has 40 divisors (see below), whose sum is σ = 3056004800. Its totient is φ = 532334592.

The previous prime is 1311122507. The next prime is 1311122537. The reversal of 1311122512 is 2152211131.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1311122512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305937 + ... + 310192.

It is an arithmetic number, because the mean of its divisors is an integer number (76400120).

Almost surely, 2^1311122512 is an apocalyptic number.

It is an amenable number.

1311122512 is an abundant number, since it is smaller than the sum of its proper divisors (1744882288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311122512 is a wasteful number, since it uses less digits than its factorization.

1311122512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616163 (or 616157 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 1311122512 is about 36209.4257341925. The cubic root of 1311122512 is about 1094.4966200975.

Adding to 1311122512 its reverse (2152211131), we get a palindrome (3463333643).

The spelling of 1311122512 in words is "one billion, three hundred eleven million, one hundred twenty-two thousand, five hundred twelve".