1311230012 has 18 divisors (see below), whose sum is σ = 2376513048. Its totient is φ = 633005968.

The previous prime is 1311229981. The next prime is 1311230021. The reversal of 1311230012 is 2100321131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 191528 + ... + 198255.

Almost surely, 2^1311230012 is an apocalyptic number.

It is an amenable number.

1311230012 is a deficient number, since it is larger than the sum of its proper divisors (1065283036).

1311230012 is a wasteful number, since it uses less digits than its factorization.

1311230012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389845 (or 389814 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1311230012 is about 36210.9101238839. The cubic root of 1311230012 is about 1094.5265321690.

Adding to 1311230012 its reverse (2100321131), we get a palindrome (3411551143).

The spelling of 1311230012 in words is "one billion, three hundred eleven million, two hundred thirty thousand, twelve".