1340344140021 has 24 divisors (see below), whose sum is σ = 2002879082880. Its totient is φ = 862721820576.

The previous prime is 1340344140019. The next prime is 1340344140043. The reversal of 1340344140021 is 1200414430431.

It is not a de Polignac number, because 1340344140021 - 2¹ = 1340344140019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340344140521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10276800 + ... + 10406406.

It is an arithmetic number, because the mean of its divisors is an integer number (83453295120).

Almost surely, 2^{1340344140021} is an apocalyptic number.

It is an amenable number.

1340344140021 is a deficient number, since it is larger than the sum of its proper divisors (662534942859).

1340344140021 is a wasteful number, since it uses less digits than its factorization.

1340344140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169265 (or 169262 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1340344140021 its reverse (1200414430431), we get a palindrome (2540758570452).

The spelling of 1340344140021 in words is "one trillion, three hundred forty billion, three hundred forty-four million, one hundred forty thousand, twenty-one".