1231040143112 has 32 divisors (see below), whose sum is σ = 2511380487000. Its totient is φ = 562314921984.

The previous prime is 1231040143111. The next prime is 1231040143117. The reversal of 1231040143112 is 2113410401321.

It can be written as a sum of positive squares in 4 ways, for example, as 869567440036 + 361472703076 = 932506^2 + 601226^2 .

It is not an unprimeable number, because it can be changed into a prime (1231040143111) 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, 61004987 + ... + 61025162.

Almost surely, 2^{1231040143112} is an apocalyptic number.

It is an amenable number.

1231040143112 is an abundant number, since it is smaller than the sum of its proper divisors (1280340343888).

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

1231040143112 is a wasteful number, since it uses less digits than its factorization.

1231040143112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122030265 (or 122030261 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1231040143112 its reverse (2113410401321), we get a palindrome (3344450544433).

The spelling of 1231040143112 in words is "one trillion, two hundred thirty-one billion, forty million, one hundred forty-three thousand, one hundred twelve".