1311232312 has 32 divisors (see below), whose sum is σ = 2649225600. Its totient is φ = 604831104.

The previous prime is 1311232309. The next prime is 1311232319. The reversal of 1311232312 is 2132321131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311232312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311232319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280458 + ... + 285094.

It is an arithmetic number, because the mean of its divisors is an integer number (82788300).

Almost surely, 2^1311232312 is an apocalyptic number.

It is an amenable number.

1311232312 is an abundant number, since it is smaller than the sum of its proper divisors (1337993288).

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

1311232312 is a wasteful number, since it uses less digits than its factorization.

1311232312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7375 (or 7371 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 1311232312 is about 36210.9418822543. The cubic root of 1311232312 is about 1094.5271721303.

Adding to 1311232312 its reverse (2132321131), we get a palindrome (3443553443).

The spelling of 1311232312 in words is "one billion, three hundred eleven million, two hundred thirty-two thousand, three hundred twelve".