340372127105321 has 4 divisors (see below), whose sum is σ = 340372536525312. Its totient is φ = 340371717685332.

The previous prime is 340372127105267. The next prime is 340372127105399. The reversal of 340372127105321 is 123501721273043.

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 a de Polignac number, because none of the positive numbers 2^k-340372127105321 is a prime.

It is a super-3 number, since 3×340372127105321³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340372127107321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203460425 + ... + 205126518.

It is an arithmetic number, because the mean of its divisors is an integer number (85093134131328).

Almost surely, 2^{340372127105321} is an apocalyptic number.

It is an amenable number.

340372127105321 is a deficient number, since it is larger than the sum of its proper divisors (409419991).

340372127105321 is an equidigital number, since it uses as much as digits as its factorization.

340372127105321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409419990.

The product of its (nonzero) digits is 211680, while the sum is 41.

Adding to 340372127105321 its reverse (123501721273043), we get a palindrome (463873848378364).

The spelling of 340372127105321 in words is "three hundred forty trillion, three hundred seventy-two billion, one hundred twenty-seven million, one hundred five thousand, three hundred twenty-one".