1311166012 has 24 divisors (see below), whose sum is σ = 2476380816. Its totient is φ = 603846528.

The previous prime is 1311165983. The next prime is 1311166033. The reversal of 1311166012 is 2106611131.

It is a super-2 number, since 2×1311166012² = 3438312622047968288, which contains 22 as substring.

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, 2713 + ... + 51280.

It is an arithmetic number, because the mean of its divisors is an integer number (103182534).

Almost surely, 2^1311166012 is an apocalyptic number.

It is an amenable number.

1311166012 is a deficient number, since it is larger than the sum of its proper divisors (1165214804).

1311166012 is a wasteful number, since it uses less digits than its factorization.

1311166012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54477 (or 54475 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1311166012 is about 36210.0264015369. The cubic root of 1311166012 is about 1094.5087242489.

Adding to 1311166012 its reverse (2106611131), we get a palindrome (3417777143).

The spelling of 1311166012 in words is "one billion, three hundred eleven million, one hundred sixty-six thousand, twelve".