1340021210345 has 8 divisors (see below), whose sum is σ = 1608047090376. Its totient is φ = 1072002542976.

The previous prime is 1340021210321. The next prime is 1340021210393. The reversal of 1340021210345 is 5430121200431.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 331260104704 + 1008761105641 = 575552^2 + 1004371^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340021210345 - 2¹⁶ = 1340021144809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385642 + ... + 2144771.

It is an arithmetic number, because the mean of its divisors is an integer number (201005886297).

Almost surely, 2^{1340021210345} is an apocalyptic number.

It is an amenable number.

1340021210345 is a deficient number, since it is larger than the sum of its proper divisors (268025880031).

1340021210345 is an equidigital number, since it uses as much as digits as its factorization.

1340021210345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3606331.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 1340021210345 its reverse (5430121200431), we get a palindrome (6770142410776).

The spelling of 1340021210345 in words is "one trillion, three hundred forty billion, twenty-one million, two hundred ten thousand, three hundred forty-five".