1240440340321 has 16 divisors (see below), whose sum is σ = 1526873818624. Its totient is φ = 981332864064.

The previous prime is 1240440340309. The next prime is 1240440340343. The reversal of 1240440340321 is 1230430440421.

It is not a de Polignac number, because 1240440340321 - 2¹⁵ = 1240440307553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1240440340321.

It is not an unprimeable number, because it can be changed into a prime (1240440340361) 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, 5706 + ... + 1575091.

It is an arithmetic number, because the mean of its divisors is an integer number (95429613664).

Almost surely, 2^{1240440340321} is an apocalyptic number.

It is an amenable number.

1240440340321 is a deficient number, since it is larger than the sum of its proper divisors (286433478303).

1240440340321 is a wasteful number, since it uses less digits than its factorization.

1240440340321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589440.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1240440340321 its reverse (1230430440421), we get a palindrome (2470870780742).

The spelling of 1240440340321 in words is "one trillion, two hundred forty billion, four hundred forty million, three hundred forty thousand, three hundred twenty-one".