1311120012 has 48 divisors (see below), whose sum is σ = 3155257952. Its totient is φ = 423429120.

The previous prime is 1311120001. The next prime is 1311120043. The reversal of 1311120012 is 2100211131.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1311120012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100878 + ... + 113130.

Almost surely, 2^1311120012 is an apocalyptic number.

1311120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311120012 is an abundant number, since it is smaller than the sum of its proper divisors (1844137940).

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

1311120012 is a wasteful number, since it uses less digits than its factorization.

1311120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12538 (or 12536 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1311120012 is about 36209.3912127779. The cubic root of 1311120012 is about 1094.4959244484.

Adding to 1311120012 its reverse (2100211131), we get a palindrome (3411331143).

The spelling of 1311120012 in words is "one billion, three hundred eleven million, one hundred twenty thousand, twelve".