1231340505344 has 72 divisors (see below), whose sum is σ = 2612580383448. Its totient is φ = 577199144960.

The previous prime is 1231340505341. The next prime is 1231340505389. The reversal of 1231340505344 is 4435050431321.

It can be written as a sum of positive squares in 4 ways, for example, as 1007694745600 + 223645759744 = 1003840^2 + 472912^2 .

It is not an unprimeable number, because it can be changed into a prime (1231340505341) 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, 568004 + ... + 1668924.

It is an arithmetic number, because the mean of its divisors is an integer number (36285838659).

Almost surely, 2^{1231340505344} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231340505344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1306290191724).

1231340505344 is an abundant number, since it is smaller than the sum of its proper divisors (1381239878104).

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

1231340505344 is a wasteful number, since it uses less digits than its factorization.

1231340505344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101211 (or 1101197 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 1231340505344 its reverse (4435050431321), we get a palindrome (5666390936665).

The spelling of 1231340505344 in words is "one trillion, two hundred thirty-one billion, three hundred forty million, five hundred five thousand, three hundred forty-four".