1231323111112 has 16 divisors (see below), whose sum is σ = 2309255968860. Its totient is φ = 615521519424.

The previous prime is 1231323111077. The next prime is 1231323111119. The reversal of 1231323111112 is 2111113231321.

It can be written as a sum of positive squares in 2 ways, for example, as 1083693492036 + 147629619076 = 1041006^2 + 384226^2 .

It is not an unprimeable number, because it can be changed into a prime (1231323111119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17467143 + ... + 17537494.

Almost surely, 2^{1231323111112} is an apocalyptic number.

It is an amenable number.

1231323111112 is a deficient number, since it is larger than the sum of its proper divisors (1077932857748).

1231323111112 is a wasteful number, since it uses less digits than its factorization.

1231323111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35009040 (or 35009036 counting only the distinct ones).

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

Adding to 1231323111112 its reverse (2111113231321), we get a palindrome (3342436342433).

The spelling of 1231323111112 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-three million, one hundred eleven thousand, one hundred twelve".