1231443041140 has 48 divisors (see below), whose sum is σ = 2785036821840. Its totient is φ = 454673433600.

The previous prime is 1231443041117. The next prime is 1231443041149. The reversal of 1231443041140 is 411403441321.

It can be written as a sum of positive squares in 8 ways, for example, as 33355177956 + 1198087863184 = 182634^2 + 1094572^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1231443041099 and 1231443041108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231443041149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17046216 + ... + 17118304.

It is an arithmetic number, because the mean of its divisors is an integer number (58021600455).

Almost surely, 2^{1231443041140} is an apocalyptic number.

1231443041140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231443041140 is an abundant number, since it is smaller than the sum of its proper divisors (1553593780700).

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

1231443041140 is a wasteful number, since it uses less digits than its factorization.

1231443041140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137812 (or 137810 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 1231443041140 its reverse (411403441321), we get a palindrome (1642846482461).

The spelling of 1231443041140 in words is "one trillion, two hundred thirty-one billion, four hundred forty-three million, forty-one thousand, one hundred forty".