1340040002321 has 4 divisors (see below), whose sum is σ = 1342516971444. Its totient is φ = 1337563033200.

The previous prime is 1340040002309. The next prime is 1340040002339. The reversal of 1340040002321 is 1232000400431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 929112849025 + 410927153296 = 963905^2 + 641036^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340040002321 - 2³⁴ = 1322860133137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340040002293 and 1340040002302.

It is not an unprimeable number, because it can be changed into a prime (1340040002621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238483750 + ... + 1238484831.

It is an arithmetic number, because the mean of its divisors is an integer number (335629242861).

Almost surely, 2^{1340040002321} is an apocalyptic number.

It is an amenable number.

1340040002321 is a deficient number, since it is larger than the sum of its proper divisors (2476969123).

1340040002321 is an equidigital number, since it uses as much as digits as its factorization.

1340040002321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476969122.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 1340040002321 its reverse (1232000400431), we get a palindrome (2572040402752).

The spelling of 1340040002321 in words is "one trillion, three hundred forty billion, forty million, two thousand, three hundred twenty-one".