340043433440021 has 2 divisors, whose sum is σ = 340043433440022. Its totient is φ = 340043433440020.

The previous prime is 340043433439991. The next prime is 340043433440069. The reversal of 340043433440021 is 120044334340043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339935875022500 + 107558417521 = 18437350^2 + 327961^2 .

It is a cyclic number.

It is not a de Polignac number, because 340043433440021 - 2³⁴ = 340026253570837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340043433448021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170021716720010 + 170021716720011.

It is an arithmetic number, because the mean of its divisors is an integer number (170021716720011).

Almost surely, 2^{340043433440021} is an apocalyptic number.

It is an amenable number.

340043433440021 is a deficient number, since it is larger than the sum of its proper divisors (1).

340043433440021 is an equidigital number, since it uses as much as digits as its factorization.

340043433440021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 35.

Adding to 340043433440021 its reverse (120044334340043), we get a palindrome (460087767780064).

The spelling of 340043433440021 in words is "three hundred forty trillion, forty-three billion, four hundred thirty-three million, four hundred forty thousand, twenty-one".