12311278232 has 32 divisors (see below), whose sum is σ = 25290280080. Its totient is φ = 5572008960.

The previous prime is 12311278223. The next prime is 12311278237. The reversal of 12311278232 is 23287211321.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311278237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279713 + ... + 320720.

Almost surely, 2^12311278232 is an apocalyptic number.

It is an amenable number.

12311278232 is an abundant number, since it is smaller than the sum of its proper divisors (12979001848).

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

12311278232 is a wasteful number, since it uses less digits than its factorization.

12311278232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600683 (or 600679 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

Adding to 12311278232 its reverse (23287211321), we get a palindrome (35598489553).

The spelling of 12311278232 in words is "twelve billion, three hundred eleven million, two hundred seventy-eight thousand, two hundred thirty-two".