340124042320421 has 4 divisors (see below), whose sum is σ = 340215498103200. Its totient is φ = 340032586537644.

The previous prime is 340124042320393. The next prime is 340124042320423. The reversal of 340124042320421 is 124023240421043.

It is a happy number.

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-340124042320421 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 (340124042320423) 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, 45727885811 + ... + 45727893248.

It is an arithmetic number, because the mean of its divisors is an integer number (85053874525800).

Almost surely, 2^{340124042320421} is an apocalyptic number.

It is an amenable number.

340124042320421 is a deficient number, since it is larger than the sum of its proper divisors (91455782779).

340124042320421 is an equidigital number, since it uses as much as digits as its factorization.

340124042320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91455782778.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 340124042320421 its reverse (124023240421043), we get a palindrome (464147282741464).

The spelling of 340124042320421 in words is "three hundred forty trillion, one hundred twenty-four billion, forty-two million, three hundred twenty thousand, four hundred twenty-one".