340423414441021 has 2 divisors, whose sum is σ = 340423414441022. Its totient is φ = 340423414441020.

The previous prime is 340423414441003. The next prime is 340423414441043. The reversal of 340423414441021 is 120144414324043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284867052780025 + 55556361660996 = 16878005^2 + 7453614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340423414441021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340423414441051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170211707220510 + 170211707220511.

It is an arithmetic number, because the mean of its divisors is an integer number (170211707220511).

Almost surely, 2^{340423414441021} is an apocalyptic number.

It is an amenable number.

340423414441021 is a deficient number, since it is larger than the sum of its proper divisors (1).

340423414441021 is an equidigital number, since it uses as much as digits as its factorization.

340423414441021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 37.

Adding to 340423414441021 its reverse (120144414324043), we get a palindrome (460567828765064).

The spelling of 340423414441021 in words is "three hundred forty trillion, four hundred twenty-three billion, four hundred fourteen million, four hundred forty-one thousand, twenty-one".