340545410221 has 4 divisors (see below), whose sum is σ = 343226870272. Its totient is φ = 337863950172.

The previous prime is 340545410213. The next prime is 340545410237. The reversal of 340545410221 is 122014545043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 340545410221 - 2³ = 340545410213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340545410321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1340729835 + ... + 1340730088.

It is an arithmetic number, because the mean of its divisors is an integer number (85806717568).

Almost surely, 2^340545410221 is an apocalyptic number.

It is an amenable number.

340545410221 is a deficient number, since it is larger than the sum of its proper divisors (2681460051).

340545410221 is a wasteful number, since it uses less digits than its factorization.

340545410221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681460050.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 340545410221 its reverse (122014545043), we get a palindrome (462559955264).

The spelling of 340545410221 in words is "three hundred forty billion, five hundred forty-five million, four hundred ten thousand, two hundred twenty-one".