1340374705321 has 2 divisors, whose sum is σ = 1340374705322. Its totient is φ = 1340374705320.

The previous prime is 1340374705253. The next prime is 1340374705331. The reversal of 1340374705321 is 1235074730431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1317433362025 + 22941343296 = 1147795^2 + 151464^2 .

It is an emirp because it is prime and its reverse (1235074730431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340374705321 - 2¹⁹ = 1340374181033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340374705331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670187352660 + 670187352661.

It is an arithmetic number, because the mean of its divisors is an integer number (670187352661).

Almost surely, 2^{1340374705321} is an apocalyptic number.

It is an amenable number.

1340374705321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340374705321 is an equidigital number, since it uses as much as digits as its factorization.

1340374705321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 1340374705321 in words is "one trillion, three hundred forty billion, three hundred seventy-four million, seven hundred five thousand, three hundred twenty-one".